How Long Does It Take to Get a Ph.D. Degree?

Earning a Ph.D. from a U.S. grad school typically requires nearly six years, federal statistics show.

How Long It Takes to Get a Ph.D. Degree

how long is an phd

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A Ph.D. is most appropriate for someone who is a "lifelong learner."

Students who have excelled within a specific academic discipline and who have a strong interest in that field may choose to pursue a Ph.D. degree. However, Ph.D. degree-holders urge prospective students to think carefully about whether they truly want or need a doctoral degree, since Ph.D. programs last for multiple years.

According to the Survey of Earned Doctorates, a census of recent research doctorate recipients who earned their degree from U.S. institutions, the median amount of time it took individuals who received their doctorates in 2017 to complete their program was 5.8 years. However, there are many types of programs that typically take longer than six years to complete, such as humanities and arts doctorates, where the median time for individuals to earn their degree was 7.1 years, according to the survey.

Some Ph.D. candidates begin doctoral programs after they have already obtained master's degrees, which means the time spent in grad school is a combination of the time spent pursuing a master's and the years invested in a doctorate. In order to receive a Ph.D. degree, a student must produce and successfully defend an original academic dissertation, which must be approved by a dissertation committtee. Writing and defending a dissertation is so difficult that many Ph.D. students drop out of their Ph.D. programs having done most of the work necessary for degree without completing the dissertation component. These Ph.D. program dropouts often use the phrase " all but dissertation " or the abbreviation "ABD" on their resumes.

According to a comprehensive study of Ph.D. completion rates published by The Council of Graduate Schools in 2008, only 56.6% of people who begin Ph.D. programs earn Ph.D. degrees.

Ian Curtis, a founding partner with H&C Education, an educational and admissions consulting firm, who is pursuing a Ph.D. degree in French at Yale University , says there are several steps involved in the process of obtaining a Ph.D. Students typically need to fulfill course requirements and pass comprehensive exams, Curtis warns. "Once these obligations have been completed, how long it takes you to write your dissertation depends on who you are, how you work, what field you're in and what other responsibilities you have in life," he wrote in an email. Though some Ph.D. students can write a dissertation in a single year, that is rare, and the dissertation writing process may last for several years, Curtis says.

Curtis adds that the level of support a Ph.D. student receives from an academic advisor or faculty mentor can be a key factor in determining the length of time it takes to complete a Ph.D. program. "Before you decide to enroll at a specific program, you’ll want to meet your future advisor," Curtis advises. "Also, reach out to his or her current and former students to get a sense of what he or she is like to work with."

Curtis also notes that if there is a gap between the amount of time it takes to complete a Ph.D. and the amount of time a student's funding lasts, this can slow down the Ph.D. completion process. "Keep in mind that if you run out of funding at some point during your doctorate, you will need to find paid work, and this will leave you even less time to focus on writing your dissertation," he says. "If one of the programs you’re looking at has a record of significantly longer – or shorter – times to competition, this is good information to take into consideration."

He adds that prospective Ph.D. students who already have master's degrees in the field they intend to focus their Ph.D. on should investigate whether the courses they took in their master's program would count toward the requirements of a Ph.D. program. "You’ll want to discuss your particular situation with your program to see whether this will be possible, and how many credits you are likely to receive as the result of your master’s work," he says.

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how long is an phd

Emmanuel C. Nwaodua, who has a Ph.D. degree in geology, says some Ph.D. programs require candidates to publish a paper in a first-rate, peer-reviewed academic journal. "This could extend your stay by a couple of years," he warns.

Pierre Huguet, the CEO and co-founder of H&C Education, says prospective Ph.D. students should be aware that a Ph.D. is designed to prepare a person for a career as a scholar. "Most of the jobs available to Ph.D. students upon graduation are academic in nature and directly related to their fields of study: professor, researcher, etc.," Huguet wrote in an email. "The truth is that more specialization can mean fewer job opportunities. Before starting a Ph.D., students should be sure that they want to pursue a career in academia, or in research. If not, they should make time during the Ph.D. to show recruiters that they’ve traveled beyond their labs and libraries to gain some professional hands-on experience."

Jack Appleman, a business writing instructor, published author and Ph.D. candidate focusing on organizational communication with the University at Albany—SUNY , says Ph.D. programs require a level of commitment and focus that goes beyond what is necessary for a typical corporate job. A program with flexible course requirements that allow a student to customize his or her curriculum based on academic interests and personal obligations is ideal, he says.

Joan Kee, a professor at the University of Michigan with the university's history of art department, says that the length of time required for a Ph.D. varies widely depending on what subject the Ph.D. focuses on. "Ph.D. program length is very discipline and even field-specific; for example, you can and are expected to finish a Ph.D, in economics in under five years, but that would be impossible in art history (or most of the humanities)," she wrote in an email.

Kee adds that humanities Ph.D. programs often require someone to learn a foreign language, and "fields like anthropology and art history require extensive field research." Kee says funding for a humanities Ph.D. program typically only lasts five years, even though it is uncommon for someone to obtain a Ph.D. degree in a humanities field within that time frame. "Because of this, many if not most Ph.D. students must work to make ends meet, thus further prolonging the time of completion," she says.

Jean Marie Carey, who earned her Ph.D. degree in art history and German from the University of Otago in New Zealand, encourages prospective Ph.D. students to check whether their potential Ph.D. program has published a timeline of how long it takes a Ph.D. student to complete their program. She says it is also prudent to speak with Ph.D. graduates of the school and ask about their experience.

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how long is an phd

Kristin Redington Bennett, the founder of the Illumii educational consulting firm in North Carolina, encourages Ph.D. hopefuls to think carefully about whether they want to become a scholar. Bennett, who has a Ph.D. in curriculum and assessment and who previously worked as an assistant professor at Wake Forest University , says a Ph.D. is most appropriate for someone who is a "lifelong learner." She says someone contemplating a Ph.D. should ask themselves the following questions "Are you a very curious person... and are you persistent?"

Bennett urges prospective Ph.D. students to visit the campuses of their target graduate programs since a Ph.D. program takes so much time that it is important to find a school that feels comfortable. She adds that aspiring Ph.D. students who prefer a collaborative learning environment should be wary of graduate programs that have a cut-throat and competitive atmosphere, since such students may not thrive in that type of setting.

Alumni of Ph.D. programs note that the process of obtaining a Ph.D. is arduous, regardless of the type of Ph.D. program. "A Ph.D. is a long commitment of your time, energy and financial resources, so it'll be easier on you if you are passionate about research," says Grace Lee, who has a Ph.D. in neuroscience and is the founder and CEO of Mastery Insights, an education and career coaching company, and the host of the Career Revisionist podcast.

"A Ph.D. isn't about rehashing years of knowledge that is already out there, but rather it is about your ability to generate new knowledge. Your intellectual masterpiece (which is your dissertation) takes a lot of time, intellectual creativity and innovation to put together, so you have to be truly passionate about that," Lee says.

Curtis says a prospective Ph.D. student's enthusiasm for academic work, teaching and research are the key criteria they should use to decide whether to obtain a Ph.D. degree. "While the time it takes to complete a doctorate is an understandable concern for many, my personal belief is that time is not the most important factor to consider," he says. "Good Ph.D. programs provide their students with generous stipends, health care and sometimes even subsidized housing."

Erin Skelly, a graduate admissions counselor at the IvyWise admissions consulting firm, says when a Ph.D. students struggles to complete his or her Ph.D. degree, it may have more to do with the student's academic interests or personal circumstances than his or her program.

"The time to complete a Ph.D. can depend on a number of variables, but the specific discipline or school would only account for a year or two's difference," she wrote in an email. "When a student takes significantly longer to complete a Ph.D. (degree), it's usually related to the student's coursework and research – they need to take additional coursework to complete their comprehensive exams; they change the focus of their program or dissertation, requiring extra coursework or research; or their research doesn't yield the results they hoped for, and they need to generate a new theory and conduct more research."

Skelly warns that the average completion time of a Ph.D. program may be misleading in some cases, if the average is skewed based on one or two outliers. She suggests that instead of focusing on the duration of a particular Ph.D. program, prospective students should investigate the program's attritition and graduation rates.

"It is worthwhile to look at the program requirements and the school's proposed timeline for completion, and meet current students to get their input on how realistic these expectations for completion are," Skelly says. "That can give you an honest idea of how long it will really take to complete the program."

Searching for a grad school? Access our complete rankings of Best Graduate Schools.

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How Do You Get a PhD? A Guide to the PhD Timeline

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Everyone who considers a doctoral degree knows a Ph.D. is a big commitment. 

Not only will it require all your mental energy, focus, and persistence, but it will also require a significant investment of your time. Your particular area of research, your institution’s policies and procedures, and the standard expectations within your field all play a significant role in how long it takes to earn a PhD. The average PhD length is five or six years, while some students may take eight or nine years.

Regardless of how long a PhD program takes,  there are some common stages of a PhD that all doctoral students share. These major and essential milestones shape the timeline for earning your doctorate . Read on as we take you through each step and explore the typical steps to a doctorate degree.

Are you just starting to apply to graduate school? Check out our Guide to  Graduate Admissions to get all your questions answered! 

How Many Credit Hours for a PhD?

The number of hours that you need to complete your doctoral coursework might depend on several factors: do you already have a master’s degree? Will you earn one en route to the doctorate? Or do you even need one? 

Different disciplines and research interests have their own PhD process, but even within your field of study, you may find that institutions have diverse pathways for obtaining that terminal degree. For most, coursework will take anywhere from two to three years to complete.

During this time, students can serve as graduate research or teaching assistants or could even lead their own courses as an instructor. In many degree programs, students develop their potential dissertation topics through their coursework and start to define what their research plans might look like in the next few years.

PhD Qualifying Exam and Comprehensive Exam

Many programs set up academic checkpoints to help keep students on track during their PhD journeys. The timing varies by program, but one of the most common – and possibly most stressful – forms of benchmarking is the PhD comprehensive exam or qualifying exam. Often administered around the end of the student’s coursework, these exams are your chance to demonstrate what you learned in your classes.

Testing is overseen by a committee of faculty from your department. Usually comprised of at least three members, your professors ask questions or assign writing prompts based on your experience in the program thus far. The format is generally a combination of written and oral exams designed to test your expertise in your discipline’s methodologies and significant content areas.

To better prepare yourself, research the number and kind of qualifying benchmarks the program will require in the university catalog before you begin your program. This will allow you and your advisor to effectively plan out the first few years of your degree and give you an idea of how you’ll be evaluated throughout your program.

Dissertation Prospectus and Defense

You may be required to complete and defend a dissertation prospectus before officially becoming a PhD candidate. A prospectus is a document outlining your dissertation plan, which includes an explanation of your research topic, a potential outline of your dissertation, the methodologies you intend to employ, the significance of your research question, and a bibliography including sources that form the foundation of your research.

Your prospectus allows your dissertation advisor to understand the scope of your project. It should be thorough enough that they can provide useful feedback to help shape your research plan. After some revisions, an approved prospectus is the green light to move into the next stage of your PhD.

Advancement to Candidacy

If you have heard the term ABD – “All But Dissertation” – then that means you are in the home stretch of your doctoral program!

Well, sort of…only your dissertation remains!

Dissertation Research and Writing

While you’ve made it through the coursework and qualifying exams, the dissertation is the culminating component of the doctoral degree. At this point, your approved research plan is ready to be set into motion. Depending on your discipline, this could be the stage where you travel extensively to conduct fieldwork, explore archives, or visit labs to collaborate on projects that relate to your dissertation work. For many students, the research phase can take a couple of years, but some may be able to complete it in one.

Writing your dissertation can be one of the most challenging parts of the whole PhD. process. Not only are you condensing years of research into a single cohesive document, but you are also formulating graphs, charts, and other textual references to help clarify your argument. Often, formatting can be a major challenge for many students. 

In this stage, it’s most helpful to seek out resources to help you with the writing process. Many universities have dissertation writing workshops where you can learn best practices, as well as support groups where students meet regularly and help keep each other accountable. Most universities also offer competitive dissertation completion grants, supporting students with additional funding so they focus more of their time and effort on completing this undertaking.

Dissertation Defense

Everyone gets nervous about this major rite of passage. It can be difficult to take criticism over something you have poured your heart and soul into for years. Remember, though, that a good advisor will not let you defend if you’re not ready, and you literally wrote the book on your topic!

The dissertation defense is not intended to tear your work apart but rather is your opportunity to prove your expertise to your dissertation committee. Many defenses are open to observers, so you should attend a few in advance of your own, especially within your department, to get a sense of what it’s like. 

First, you’ll present the main points of your thesis. Then the committee will ask questions so they can clearly understand your arguments. Finally, they’ll send you out of the room while they deliberate and decide if you pass or not. If all goes well, you’ll be addressed as “Doctor” the next time you walk into the room!

Get Started on Your PhD Journey Today

No matter what your particular timeline looks like as you work toward your doctorate, know that the faculty and other students within your program are frequently a huge source of support — which means you won't do this alone! Additionally, every school has resources to assist Ph.D. students, from libraries to writing centers to dedicated student support services. 

If you are excited about beginning your Ph.D. journey, we invite you to request more information or reach out to one of our admissions professionals today. Best of luck as you begin this transformational experience!

learn more about

what it takes to apply to and succeed in a PhD program. Explore our resource — A Guide to Choosing, Applying for, and Thriving in a PhD Program!

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How Long Does it Take to Get a PhD?: A Go-Getter’s Guide to Graduation

Featured Expert: Dr. Charlene Hoi, PhD

How Long Does it Take to Get a PhD?

How long does it take to get a PhD? On average, PhD programs are 4 or 5 years long. The time it takes to get a PhD is slightly longer in the US, between 4-6 years, because these programs tend to be more structured. If you want to know how to get a PhD in Canada or Europe, you can expect it to take 3-5 years. However, there are PhD programs that take longer, such as part-time programs, or are extremely short, like online accelerated PhD programs. Ultimately, how long it takes to get a PhD is up to you. In this article, we’ll look at the average PhD program lengths, the typical PhD timeline, and tips on how to get your PhD finished faster.

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Article Contents 13 min read

How long does it take to get a phd.

On average, it takes 4-5 years to complete a Doctor of Philosophy (PhD) program. In the US, most PhD programs are between 4-6 years, while in Canada they are typically shorter, around 3-4 years.

Some students take longer than 6 years to complete their PhD, but in general the longest time it takes to get a PhD is capped at 8 years. If you’re enrolling in a part-time PhD program, for instance, your timeline will probably be extended to 6-8 years.

The shortest PhD programs out there are accelerated or sometimes online PhD programs. Some of these are only 1-2 years long, but there are comparatively fewer programs available, and they are only suitable for certain fields and careers which require less intensive research which defines most PhD programs.

One of the main reasons why it takes many years to get a PhD is because these programs are comprehensive and the requirements to graduate are extensive. Most have a set number of credit hours you need to complete, examinations to write, plus you’ll need to write your PhD thesis or dissertation, unless you pursue a PhD without dissertation .

There are certainly ways to shorten the PhD application timeline and time to graduate, which includes enrolling in a shorter program if possible, increasing your course load or the number of research hours you can dedicate per week, but generally a PhD will still take some time.

Even if you want to do a PhD without a master’s degree first, such as by applying to a direct entry PhD program, the program is still usually 4-5 years long.

We’ll take a look at the typical PhD timeline and how long it takes to get a PhD normally. After, we’ll cover some tips on how to get your PhD done faster or how you can avoid dragging things out.

In North America, the typical PhD program is divided into two stages. The first stage is where you complete all the required coursework, comprehensive exams and other academic requirements, depending on the program. The second stage is when you submit a proposal for original, independent research, get it approved and start working on your thesis or dissertation. Your PhD culminates with your thesis defense. Once your thesis has been approved, you’ll be eligible to graduate.

This timeline is somewhat flexible, as you might complete the first stage in 1 or 2 years but take longer to complete your dissertation. For the purpose of this general PhD schedule, we’ll assume your PhD program is a typical length of 4-6 years.

Application Stage

We’ve included the application stage of getting your PhD here first because the grad school application timeline can take several months to put together your application package and hear back about acceptance to a program. Secondly, because the application stage involves some critical steps you’ll need to complete in order to get your PhD.

1. Research proposal

To apply to a PhD program, you’ll most likely be required to submit a research proposal and be prepared to answer any research proposal questions your advisor will have. This is your “proposal” of what research question you will explore during your studies at a program, or an outline of what research topic you want to pursue. If you’re not sure how to write a research proposal, check out these Oxford PhD proposal samples or a Cambridge PhD proposal sample.

2. Application materials

The admission requirements for a PhD can vary from program to program, but here are the general components of a PhD application:

  • Required prerequisite coursework
  • Official transcripts (and minimum GPA)
  • Graduate school statement of purpose
  • CV for graduate school or research resume
  • PhD motivation letter

Some programs may also ask you to submit additional essays, such as a letter of intent, research interest statement or grad school career goals statement .

Many PhD programs also invite you to a grad school interview to get to know you better. Be ready for common graduate school interview questions such as “ tell me about yourself ” and “ why do you want to do a PhD ?”

Writing a grad school statement of purpose? Check out these examples:

PhD Years 1-3: Coursework Stage

1. orientation.

Your PhD program will usually begin with your orientation, where you’ll learn about the program’s individual structure, requirements and expectations. You’ll also either choose or be assigned an academic advisor and schedule an initial meeting with them. Your advisor will be a member of the university faculty who will act as your support while you complete your research and write your thesis.

2. Coursework

The first year or two of your PhD will involve completing required advanced coursework in your field. You’ll attend lectures and seminars and you may participate in research projects with department faculty or fellow graduate students or even lab work, depending on your field.

3. Electives

Along with required coursework, you’ll have the chance to take elective courses that interest you or relate to your field. It’s important to choose electives that will enrich your program. Choose ones that really interest you, that might help inform your PhD research or that will help you fulfill your credit requirements.

4. Extracurriculars

PhD programs sometimes have extracurricular activities or additional requirements outside the classroom. This can include internships or a practicum you need to complete for credit, or you might be interested in attending academic conferences or relevant events to socialize and network you’re your colleagues in the field.

5. Comprehensive exams

The coursework stage of your PhD program will end with comprehensive exams , sometimes called qualifying or preliminary exams. These are your “final exams” to make sure that you completed the necessary PhD coursework and that you’re ready and qualified to take on your own independent research in the next phase.

1. Thesis proposal

You may recall that you submitted a research proposal as part of your PhD application, and this step of the process is similar. Your thesis proposal is just like your research proposal, but it’s a more refined and developed version. Throughout your coursework, your research question might have changed or you might have changed course a little bit. If you’re still thinking about your PhD topic , take the time to solidify it before you reach the thesis proposal stage.

Your research proposal might have been a first draft, while your thesis proposal is your official announcement of: this is what I propose to research in this PhD program.

Depending on your field and the program, you thesis research might involve a great deal of lab work, or data collection or fieldwork. Whatever the case, your thesis proposal is a complete outline of what you intend to do for this independent research project and the steps you’ll take.

2. Thesis approval

Once your proposal is written, you’ll submit it for approval. Your academic advisor, PhD supervisor or the PhD committee overseeing your program will review it and either approve it or make suggestions for changes. Once it’s been polished and finalized, you’ll be given the go ahead to start conducting your research.

3. PhD research

Your research alone will probably take you several semesters to complete. On top of the fieldwork, lab work or data collection and analysis you’ll be completing, you’ll be using this time to write and review. Writing your thesis or dissertation takes a fair number of hours to outline, draft, edit and complete. It also means hitting the books to complete a literature review of your research topic so you have a complete background understanding of your chosen topic and how it will inform your research.

Your research and the preparation of your thesis is really the biggest part of this second stage, and is probably the longest part of your PhD altogether.

4. Extra requirements

When you’re not deep in your research, you’ll be completing other requirements of your PhD program or additional duties that enrich your education. Some programs require you to dedicate some hours to teaching, whether it be leading seminars for undergraduate students or acting as a teaching assistant for university faculty.

You’ll also be strongly encouraged to publish as a graduate student , so you may be involved in the research projects of faculty members or other grad students when you’re not working on your dissertation.

5. Thesis submission and preparation for thesis defense

When you’re finished writing your thesis and you’re ready to submit it, it’s critical to know how to prepare for thesis defense . Because not only do you have to complete this original, new body of research work, you have to get the approval of your PhD committee to put it out into the world.

Your thesis defense is essentially the final presentation of your PhD.

6. Thesis defense

Your thesis defense is an oral presentation of your research project, but it also involves submitting your written document to be reviewed. Essentially, you’ll present the entirety of your thesis to the PhD supervising committee, including your findings and conclusions. From there, the committee will ask thesis defense questions . Your answers will defend your methodology and results to the committee, basically proving the value and validity of your work. While this is an evaluation of sorts, it is also your opportunity to share your original ideas and invite further research into your topic.

After your defense, the PhD committee will either approve your thesis or send it back to you with edits or changes to be made before it can be formally approved.

Graduation and Postdoc

Once your thesis has been approved, congratulations! You’ll be eligible for graduation and be awarded your degree. Now that you’ve finished this marathon, you can choose to pursue further studies or start looking for a job after grad school .

With a PhD, you have many different options for positions in your field. You might want to know how to find a job in academia or how to get a tenure track position at a university if you’re interested in teaching others. PhD graduates who decide to transition from academia to industry or who would rather work outside the realm of academia can find industry jobs after PhD that suit their skills and experiences.

Either way, you’ll need to prepare for how to find a postdoc position, explore what the career options are for you, decide what your career goals are and start sending out applications. Remember to prep your postdoc resume and get read for postdoc interview questions , since the job hunt will begin soon after you finish your PhD!

Is it possible to get your PhD done faster? What are some ways you can speed up the process and avoid taking 8 years to complete your graduate studies? Luckily, there are many key ways you can make your journey through grad school easier and speed things up a little, from the type of PhD program you choose to the habits and skills you cultivate during your program.

#1 Enroll in an accelerated program

The first way to guarantee it will take less time to get your PhD is to, of course, enroll in a shorter PhD program. Direct entry PhD programs allow you to enroll once you’ve completed your bachelor’s degree in exceptional circumstances. Note that these are not the easiest PhD programs to get into , as your academic record needs to be excellent, and you’ll likely need prior research experience and you may even need to have publications already. However, a direct entry PhD program is around 4-5 years, but it allows you to skip the 1-2 years it would take to earn a master’s degree.

You can also choose to enroll in an online or accelerated PhD program that is designed to be much shorter than the traditional PhD. Once again, though, these programs are not available to students in every field, so you may need to research whether there are any options for you.

#2 Choose the right mentor

One of the first things you can do to ensure your PhD is smooth sailing is to choose the right mentor or academic advisor. Many programs allow you to choose your advisor, while some assign one to you. Whatever the case, it’s important to establish a strong working relationship and clear expectations early on.

One of the first things you’ll do as a PhD student is meet with your advisor. Take the time to discuss with them what your expectations for the program are, ask questions and ask them what their expectations are of you. Your advisor is there to help you and advise you, and they have resources and connections you can use to your advantage. But they are also working with a busy schedule and might be advising more than one PhD student, too. A mutually respectful relationship with open communication will ensure fewer interpersonal hurdles down the road.

#3 Earn credit hours faster

One way you can shave some time off your PhD is by earning your credit hours faster and getting to the research and thesis-writing stage faster. This might mean you take on a full-time course load or ask your advisor for ways to earn extra credit, such as participating in research projects. Some PhD programs will give you course credit for previous graduate level coursework you might have completed during your master’s degree, or for certifications and professional education you completed outside of school.

#4 Keep your thesis focused

When you get started on your research, it’s easy to feel overwhelmed with the amount of work you need to complete, with the writing of your thesis on top of it all. One way to keep your research hyper-focused and on point is to keep your thesis topic narrow. If your subject is too broad, you’ll be spending way too much time in your research. Give yourself clear objectives and scope, and don’t deviate from your PhD proposal if you don’t have to.

There may be a million questions you want to explore within your PhD topic, but there will be other opportunities to explore them. Keep your focus narrow so you don’t spend years and years asking and answering research questions!

One of the best things you can do to get your PhD done faster and adjust to the experience of graduate school is to change your thinking. Adopt a growth mindset so that you’re open to new learning, willing to listen to constructive feedback on your proposal or thesis and willing to grow your skills. A PhD is an advanced program, and you’ll already be very skilled, but it is also an opportunity to learn and grow. There will be challenges for you, so be ready to meet and overcome them instead of letting them draw you back or slow you down.

#5 Develop your professional skills fast

A PhD is an opportunity to grow your professional skillset as much as it is an opportunity for you to contribute meaningfully to your field. If you haven’t already been working on skills such as communication, presenting or lecturing and writing, now is the time to start.

Strong writing skills will help you get your thesis finished and edited faster, as you’ll be more familiar with the process and understand what makes a strong document. It’s also a useful skill to learn how to write effective funding proposals or grant proposals. You may need to do so to secure funding for your research, but it’s a highly valuable skill in the workforce, too.

Good presentation skills will help you during your thesis defense or if you’re asked to present during a conference. They will also help you build confidence in your voice and ideas and make you a better communicator when you’re networking or job searching.

#6 Keep to your schedule

This is maybe the most important skill if you want to finish your PhD faster: make a detailed schedule and hold yourself accountable to it. If you like, you can plan out your entire PhD week by week from Day 1. Write down what your course schedule is, when you’ll do research and how many hours, when you’ll write and how many hours, what extracurriculars or personal activities will take up your time and so on.

A detailed schedule gives you an overview of your PhD and a timeline of when you’ll finish. It will keep you organized and accountable, so you can avoid procrastinating or avoidable speed bumps that might slow you down. It also helps you compartmentalize the many items on your to-do list so you don’t stress out about how much you need to accomplish.

When creating your schedule, especially during the research stage when there is no formal class schedule for you to adhere to, focus on deliverables. Set a date when you will submit a section of your thesis to your advisor, or when you will complete your literature review. Setting goals and clear outcomes will keep you on track and focused.

#7 Take initiative and be independent

The last tip to help you get your PhD done faster is to take initiative. Remember that a PhD is a largely independent endeavor. You’ll have the support of a committee or advisor, but you can’t rely on them to do the work for you or put everything on hold if they aren’t available when you need them. Be flexible and adaptable so you can keep working and moving forward, even if your schedule gets interrupted or needs to change to suit your situation.

It's also important to take the initiative in your learning. Take advantage of opportunities for growth, networking, and gaining experience where you can. Get the most out of your PhD program and use your experiences to fuel your end goal of completing your thesis.

On average, it takes 4-5 years to get a PhD. There are a few factors that can influence the time it takes to complete your PhD, from program length and structure to what country you are earning your PhD in, to your own personal work ethic and schedule.

PhD programs in the US are on average 4-6 years. In Canada and the UK, they are usually 3-5 years long. Part-time PhD programs may take up to 7-8 years to complete. Direct-entry PhD programs and dual master’s and PhD programs are typically 5 years long. If you’re enrolling in an online, hybrid or accelerated PhD program, the timeline is usually 2-3 years, but there are some extremely short 1-year PhD programs offered online for specific disciplines.

Yes, you can finish your PhD before the “normal” timeline. For example, if you complete your coursework early, if you finish writing your thesis faster than average and get it approved, or if you otherwise complete all your PhD program requirements before the anticipated finish date. 

Yes, there are online PhDs available for certain fields and disciplines. These typically range from 2-3 years, although there are some traditional 4-year PhD programs offered online. There are also some “accelerated” online PhDs which last 12-18 months.

A PhD program is not necessarily shorter if you first complete a master’s degree, but having gone through a master’s program can better prepare you to finish your PhD faster. Some PhD programs accept credit hours from your master’s degree towards the coursework requirements for a PhD, and if you’ve previously written a master’s thesis or completed some research during your graduate studies, this will be an advantage. Since you’ll already be familiar with the process of writing a thesis and conducting your own research, you can avoid some stumbling blocks in your PhD program that might otherwise slow down your progress.

Yes, it is possible to get a PhD without first completing a master’s degree. There are direct entry PhD programs that allow students with a bachelor’s degree to enroll, so long as they meet the admission requirements and have exceptional academic records. Some online PhDs also waive the master’s degree requirement.

Yes, it is possible to complete a traditional PhD program in a shorter amount of time than anticipate. This usually means dedicating yourself to full-time study or taking on a larger course load and increased research hours. It takes significant work, but it can be done with the right schedule and commitment.

The fastest PhD programs are the short, 1-year accelerated programs. These programs have fewer credit hours to complete, and some have no dissertation requirement, only qualifying exams to finish. However, there are not many programs out there, and they are not available for every field of interest.

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how long is an phd

How Long Does It Take to Get a PhD?

If you aspire to rise to the top of your field, then you may have your sights set on a PhD.

PhD students in a group study

Earning a doctoral degree can be a years-long process, but choosing an accelerated doctoral online program may help you complete your program more quickly.

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Whether you’re wanting to earn one of the highest paying doctoral degrees or you have a specific one in mind, this guide can help walk you through how long it takes to complete your PhD program.

a watch showing years

For a traditional, campus-based PhD program, the average time to finish a PhD is 8 years. Fulfilling the program’s requirements will often demand a serious investment of your time.

Even still, some people are able to finish their programs in just 3 to 6 years. Multiple factors may influence the overall length of your program.

Required Credit Hours

Many PhD programs require you to earn 120 credit hours before entering the exam and dissertation phases.

Fortunately, there are PhD programs without such high credit-hour demands. For example, at some universities, you may earn a PhD with only 60 credit hours.

Full-Time vs. Part-Time Schedule

Enrolling in a doctoral program part-time may allow you to keep up with your regular job. You’ll have to decide whether you prefer the flexibility of part-time schooling or the faster schedule of full-time studies.

Final Project Requirements

Many PhD programs end with the completion of a dissertation. This assignment may take years to complete, so PhD students often end up in the all-but-dissertation (ABD) phase for quite some time.

University Scheduling

Some schools promote their ability to help you through the PhD process faster than normal. Accelerated class schedules with eight-week online courses may speed your studies along. Focused attention from dissertation advisors may help as well.

PhD Program Components

students in class

Before you enroll in a PhD program, it’s important to know some of the basic requirements:

Prerequisites

Most schools require you to already hold a master’s degree, but some offer bachelor’s-to-PhD programs.

Length to Completion

On average, it takes eight years to earn a PhD. Even still, completing doctoral coursework and a dissertation in three to four years is not unheard of.

Topic of Interest

PhD stands for Doctor of Philosophy, but that doesn’t mean you’ll be getting a philosophy degree. Your field of study will depend on your interests and the programs that your university offers. You may tailor your doctoral focus though your choice of a dissertation topic.

Steps to Completion

You’ll take advanced classes before sitting for comprehensive exams. After passing your exams, you’ll likely begin working on a dissertation. You must defend your dissertation before finishing your program.

Doctoral studies begin with a series of classes through which you may increase your knowledge of your field of study and learn about conducting research. These are advanced classes, so they should be more in-depth than the ones you took during your undergraduate and master’s programs.

The number of courses that you need to take can vary significantly. It’s not uncommon for PhD programs to require 120 credit hours of coursework. That amounts to about 40 classes.

At other schools, the requirements are lower. Your university’s program may involve just 60 credit hours or, possibly, even fewer. A less intense course load may significantly slash your time to completion.

Your university may require you to maintain a GPA above a minimum threshold. An unsatisfactory GPA may keep you from moving on to the next step of the PhD process.

Comprehensive Examinations

Universities often require students to demonstrate their readiness for a doctoral project before advancing to the next stage of their studies. Readiness is proven through comprehensive exams , which may also be known as:

  • Preliminary examinations
  • Major field examinations
  • General examinations

Often, comprehensive exams take the form of written or oral tests. In other situations, faculty may assess students’ readiness on the basis of a portfolio evaluation or a written paper.

Dissertation and Defense

PhD dissertation paper

A dissertation, also known as a graduate thesis, is a body of work that presents original research in your field. This manuscript focuses on a unique idea and includes evidence to support your thesis. During your doctoral studies, there are classes designed to help prepare you for your dissertation work.

The dissertation process may take several years. Once your manuscript is complete, you must defend it to the doctoral program faculty. After your defense, you may need to do further work on your manuscript, or the committee may decide that your dissertation is complete.

Not all programs require a dissertation. Instead, there may be an alternative doctoral project. Although both dissertations and capstone projects are rigorous, projects can sometimes be completed within a shorter time frame.

Average Time to Complete PhD by Field of Study

Students in some disciplines usually take a lot more time to finish their doctoral work than students in other fields.

If you’re studying in the following scientific fields, you may be more likely to earn your on-campus degree in seven years or less:

  • Physics — average of five years
  • Psychology — average of five to seven years

On the other hand, if your field of study relates more to the humanities, your on-campus degree program may take longer:

  • History — average of eight years
  • English — average of eight years
  • Education — average of 13 years

These are the traditional figures. There are ways to finish faster.

Why Does It Take So Long to Finish a Traditional PhD?

student studying in a college library

Some schools require doctoral students to take around 40 classes, which, in a traditional on-campus setting, may take years. After completing the coursework, you must write your dissertation and defend it. The dissertation process alone might take multiple years.

Doctoral programs online may help shorten the PhD process to three or four years. Fewer credit hours may be required, and the classes may be delivered in an accelerated format.

Schools with an emphasis on quick doctoral programs may also offer dissertation advisors to efficiently guide students through that phase. Alternatively, some universities allow students to complete capstone projects that don’t take as long as dissertations.

Getting a PhD Online vs. Campus

student working on her laptop

Online education has changed students’ options for earning a PhD. These days, aspiring students may choose whether to attend classes on a college campus or online.

Traditional programs may require you to relocate to the university’s campus and attend school full-time. On average, it takes just over eight years to complete those programs. The benefits of choosing an online school instead may include:

Faster Progress

Accelerated eight-week courses may allow you to finish your course load sooner. You may complete your entire program in just three or four years.

Multiple Start Dates

Online programs often let you join throughout the year, so you don’t have to put your studies on hold until the fall semester.

Flexibility

Not being required to move to campus or come to class at set times may allow you to work your studies around your schedule.

Equal Status

Online programs are just as rigorous as on-campus ones. As long as your university is accredited, your degree will be just as valuable as one from a traditional university setting.

Cost-Savings

Finishing your doctoral studies faster may mean that you pay less tuition.

How to Finish Your PhD in Less Time

PhD graduation ceremonies

Although you can’t earn a doctoral degree overnight, you shouldn’t have to spend the majority of your working years striving toward PhD-completion. The following tips for accelerating the PhD process may help you finish your studies more quickly than the average doctoral student.

1. Use What You Already Know

Every school requires a minimum number of credit hours that you must earn in the pursuit of your degree. To help you meet this threshold, some schools will allow you to transfer in credits from other doctoral programs. Universities may also give you credit for your professional experience. Reducing your class load may save you both time and money.

2. Look for Short Classes

Accelerated course schedules are one of the best ways to speed through the degree process. Every eight weeks, you’ll begin a new set of classes. Over the course of a year, there may be five different sessions during which you can take classes.

3. Work on Your Dissertation Throughout the Program

Traditionally, dissertation work begins once the classroom portion of your studies is over. Quick doctoral programs may allow you to begin the dissertation process while you’re still taking other classes. This approach, known as an embedded dissertation, may reduce the likelihood that you’ll drop out before finishing your final project. It might also speed up your doctoral timeline.

4. Ask for Help

A lack of support can lead some doctoral students to drop out. On the other hand, having a good support system can help you push through and finish your program more quickly. Build a team of family, friends, and academic mentors who can encourage you, guide you, and lend practical help when you’re feeling overwhelmed by school.

Why Get a PhD?

You may need to earn a doctoral degree to achieve your career goals . For example, if you want to become a clinical psychologist, this level of study is essential. Many scientific and research positions require doctoral studies. University faculty typically need to hold terminal degrees as well.

Even if a doctorate is not a requirement for your desired line of work, it may help you achieve greater success. You might be granted higher levels of responsibility, and you may earn more money. In some fields, those who hold PhDs make around 20% more than those with master’s degrees, according to the Bureau of Labor Statistics .

Do You Have to Have a Master’s Degree to Get a PhD?

Many schools consider a master’s degree an essential prerequisite for PhD admission. If you don’t already have a master’s degree, a bachelor’s-to-doctorate program may allow you to earn a master’s and a PhD for less time and money than it would take to pursue them separately.

How Long Does It Take to Get a PhD After a Master’s?

You may be able to complete your doctoral program in three to four years if you opt for an accelerated online program. On average, traditional on-campus PhD programs take around eight years to complete.

How Hard Is It to Finish a PhD?

Doctoral studies are challenging. That shouldn’t come as a surprise; if doctorates were easy to acquire, nearly every college graduate would end up with a PhD behind his or her name.

Approximately 50% of students who begin a PhD program don’t end up finishing. Many quit within two years of starting. Another large portion gives up upon reaching the dissertation phase.

Although all PhD programs are challenging, the flexible nature of online programs may help you find success. Choosing a doctoral track that doesn’t require a dissertation may help as well.

What Is the Easiest PhD to Get?

Easiest PhD to Get

All PhD programs are demanding, but you might have an easier time if you select a program that aligns with your interests and your career goals. The flexibility of online study may help your doctoral program seem less burdensome. In addition, capstone projects are sometimes easier than writing dissertations.

If earning a doctoral degree in a short time frame is important to you, then consider the many potential benefits that online programs have to offer. Within just a few years, you may be able to place the letters “PhD” at the end of your name.

how long is an phd

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  • Master’s vs PhD | A Complete Guide to the Differences

Master's vs PhD | A Complete Guide to the Differences

Published on November 27, 2020 by Lauren Thomas . Revised on June 1, 2023.

The two most common types of graduate degrees are master’s and doctoral degrees:

  • A master’s is a 1–2 year degree that can prepare you for a multitude of careers.
  • A PhD, or doctoral degree, takes 3–7 years to complete (depending on the country) and prepares you for a career in academic research.

A master’s is also the necessary first step to a PhD. In the US, the master’s is built into PhD programs, while in most other countries, a separate master’s degree is required before applying for PhDs.

Master’s are far more common than PhDs. In the US, 24 million people have master’s or professional degrees, whereas only 4.5 million have doctorates.

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Master’s vs phd at a glance, which is right for you, length of time required, career prospects, costs and salaries, application process, other interesting articles, frequently asked questions about master's and phd degrees.

The table below shows the key differences between the two.

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how long is an phd

A PhD is right for you if:

  • Your goal is to become a professor at a university or some other type of professional researcher.
  • You love research and are passionate about discovering the answer to a particular question.
  • You are willing to spend years pursuing your research even if you have to put up with a lot of dead ends and roadblocks.

A master’s degree is the better choice if any of the following apply:

  • You want to continue studies in your field, but you’re not committed to a career as a professional researcher.
  • You want to develop professional skills for a specific career.
  • You are willing to pay a higher upfront cost if it means finishing with your degree (and thus being able to work) much faster.
  • You want the option to study part-time while working.

The length of time required to complete a PhD or master’s degree varies. Unsurprisingly, PhDs take much longer, usually between 3–7 years. Master’s degrees are usually only 1–2 years.

Length of a master’s

Master’s degrees are usually 2 years, although 1-year master’s degrees also exist, mainly in the UK.

Most of the degree consists of classes and coursework, although many master’s programs include an intensive, semester-long master’s thesis or capstone project in which students bring together all they’ve learned to produce an original piece of work.

Length of a PhD

In the US, a PhD usually takes between 5 and 7 years to complete. The first 2 years are spent on coursework. Students, even those who choose to leave without finishing the program, usually receive a master’s degree at this point.

The next 3–5 years are spent preparing a dissertation —a lengthy piece of writing based on independent research, which aims to make a significant original contribution to one’s field.

Master’s degrees tend to prepare you for a career outside of academia, while PhDs are designed to lead to a career in research.

Careers for master’s graduates

There are two types of master’s degrees: terminal and research-intensive. The career prospects are different for each.

Terminal master’s degrees are intended to prepare students for careers outside of academia. Some degrees, known as professional degrees, specifically prepare students for particular professions; these include the Master of Public Policy (MPP), Master of Business Administration (MBA), Doctor of Physical Therapy (DPT), Master of Fine Arts (MFA), and Master of Public Health (MPH) degrees.

Other master’s degrees, usually Master of Arts (MA) or Master of Sciences (MS or MSc) degrees, do not necessarily lead to a specific career, but are intended to be a final degree. Examples include an MS in Communications or MS in Data Analytics.

In research-intensive master’s programs, students take coursework intended to prepare them for writing an original piece of research known as the master’s thesis . Such programs are usually intended to prepare for further study in a doctoral program.

Careers for PhD graduates

As research degrees, PhDs are usually intended to lead to an academic career. A PhD can be thought of like an apprenticeship, where students learn from professional researchers (academics) how to produce their own research.

Most students aspire to become a university professor upon the completion of their degree. However, careers in academia are highly competitive, and the skills learned in a doctoral program often lend themselves well to other types of careers.

Some graduates who find they prefer teaching to producing research go on to be teachers at liberal arts colleges or even secondary schools. Others work in research-intensive careers in the government, private sector, or at think tanks.

Below are a few examples of specific fields and non-academic careers that are common destinations of graduates of those fields.

  • Computer Science
  • Lab Sciences

Many government jobs, including economists at a country’s central bank, are research-intensive and require a PhD. Think tanks also hire economists to carry out independent research.

In the private sector, economic consulting and technology firms frequently hire PhDs to solve real-world problems that require complex mathematical modeling.

Graduate students from the humanities are sometimes hired by museums, who can make use of their research and writing skills to curate exhibits and run public outreach.

Humanities PhDs are often well-suited to research and grant-writing roles at nonprofits. Since so much of research is funded by grants, PhD students often gain a lot of experience applying for them, which is a useful skill in the nonprofit sector.

There are a wide range of non-academic research jobs for lab scientists with doctorates in subjects like chemistry, biology, ecology and physics.

Many PhD graduates are hired by pharmaceutical companies that need to perform research to create and test their products. Government agencies, such as the Environmental Protection Agency (EPA), also hire lab scientists to work on research projects.

Job prospects after graduation vary widely based on the field. In fields like management, computer science, statistics, and economics, there’s little underemployment—even graduates from less well-known programs can easily find jobs that pay well and use the skills they’ve gained from the PhD.

However, in other fields, particularly in the humanities, many PhD graduates have difficulty in the job market. Unfortunately, there are far more PhD graduates than assistant professor roles, so many instead take on part-time and low-paid roles as adjunct instructors. Even non-academic careers can sometimes be difficult for PhDs to move into, as they may be seen as “overqualified”  or as lacking in relevant professional experience.

Because career options post-PhD vary so much, you should take the time to figure out what the career prospects are in your field. Doctoral programs often have detailed “placement” records online in which they list the career outcomes of their graduates immediately upon leaving the program. If you can’t find these records, contact the program and ask for them—placement information should play an important role in your choice of PhD program.

Although PhDs take far longer to complete, students often receive a living stipend in exchange for being a teaching or research assistant. Master’s degrees are shorter but less likely to be funded.

Both master’s degrees and PhDs lead to increased salaries upon graduation. While PhDs usually earn a bit more than those with a master’s degree, in some fields, the wages are identical, meaning that no financial benefit is gained from going on to a PhD.

Cost of a master’s

The upfront cost of a master’s degree is usually higher than a doctoral degree due to the lower amount of financial aid available. However, increased salaries also arrive faster than with a doctoral degree, because people graduate much earlier from a master’s program.

Some master’s students do receive stipends for their degrees, usually as compensation for being a teaching or research assistant. In addition, many people complete master’s degrees part time while working full-time, which allows them to fund their living costs as well as tuition.

The cost varies significantly by school and program. Public schools are usually cheaper than private ones. Some master’s degrees, such as MBAs, are notoriously expensive, but also result in much higher wages afterwards that make up for the high cost.

The master’s wage premium , or the extra amount that someone with a master’s degree makes than someone with just a high school diploma, is 23% on average. Many universities provide detailed statistics on the career and salary outcomes of their students. If they do not have this online, you should feel free to contact an administrator of the program and ask.

Cost of a PhD

PhDs, particularly outside the humanities, are usually (though not always) funded, meaning that tuition fees are fully waived and students receive a small living stipend. During the last 3–5 years of a PhD, after finishing their coursework (and sometimes before), students are usually expected to work as graduate instructors or research assistants in exchange for the stipend.

Sometimes students can apply for a fellowship (such as the National Science Foundation Graduate Research Program in the United States) that relieves them of any obligations to be a teaching or research assistant. Doctoral programs in the US tend to be better funded than in the rest of the world.

Sometimes, PhD degrees can be completed part-time, but this is rare. Students are usually expected to devote at least 40 hours a week to their research and work as teaching or research assistants.

The main cost of doctoral programs comes in the form of opportunity cost—all the years that students could be working a regular, full-time job, which usually pays much better than a graduate school stipend.

The average wage premium for PhDs is 26%, which is not much higher than the master’s degree premium.

In the US, the application process is similar for master’s and PhD programs. Both will generally ask for:

  • At least one application essay, often called a personal statement or statement of purpose .
  • Letters of recommendation .
  • A resume or CV .
  • Transcripts.
  • Writing samples.

Applications for both types of programs also often require a standardized test. PhDs usually require the Graduate Record Examination (GRE), which tries to measure verbal reasoning, quantitative, critical thinking , and analytical writing skills. Many master’s programs require this test as well.

Applying for a master’s

Master’s degrees programs will often ask you to respond to specific essay prompts that may ask you to reflect upon not just your academic background, but also your personal character and future career ambitions.

Northwestern University’s Kellogg Business School requires Master’s of Business Administration (MBA) applicants write two essays, one about a recent time they demonstrated leadership and the second about their personal values.

Who you should ask for your letters of recommendation varies by program. If you are applying to a research-intensive master’s program, then you should choose former professors or research supervisors. For other programs, particularly business school, current work supervisors may be a better choice.

Some professional master’s programs require a specific test. For example, to apply to law school, you must take the Law School Admissions Test, or LSAT. For business school, you must take either the GRE or the Graduate Management Admissions Test (GMAT).

Applying for a PhD

When applying for a PhD, your resume should focus more on your research background—you should especially emphasize any publications you’ve authored or presentations that you’ve given.

Similarly, your statement of purpose should discuss research that you’ve participated in, whether as an assistant or the lead author. You should detail what exactly you did in projects you’ve contributed to, whether that’s conducting a literature review, coding regressions, or writing an entire article.

Your letters of recommendations should be from former professors or supervisors who can speak to your abilities and potential as a researcher. A good rule of thumb is to avoid asking for recommendations from anyone who does not themselves have a PhD.

If you want to know more about college essays , academic writing , and AI tools , make sure to check out some of our other language articles with explanations, examples, and quizzes.

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A master’s is a 1- or 2-year graduate degree that can prepare you for a variety of careers.

All master’s involve graduate-level coursework. Some are research-intensive and intend to prepare students for further study in a PhD; these usually require their students to write a master’s thesis . Others focus on professional training for a specific career.

A PhD, which is short for philosophiae doctor (doctor of philosophy in Latin), is the highest university degree that can be obtained. In a PhD, students spend 3–5 years writing a dissertation , which aims to make a significant, original contribution to current knowledge.

A PhD is intended to prepare students for a career as a researcher, whether that be in academia, the public sector, or the private sector.

This depends on the country. In the United States, you can generally go directly to a PhD  with only a bachelor’s degree, as a master’s program is included as part of the doctoral program.

Elsewhere, you generally need to graduate from a research-intensive master’s degree before continuing to the PhD.

This varies by country. In the United States, PhDs usually take between 5–7 years: 2 years of coursework followed by 3–5 years of independent research work to produce a dissertation.

In the rest of the world, students normally have a master’s degree before beginning the PhD, so they proceed directly to the research stage and complete a PhD in 3–5 years.

A master’s degree usually has a higher upfront cost, but it also allows you to start earning a higher salary more quickly. The exact cost depends on the country and the school: private universities usually cost more than public ones, and European degrees usually cost less than North American ones. There are limited possibilities for financial aid.

PhDs often waive tuition fees and offer a living stipend in exchange for a teaching or research assistantship. However, they take many years to complete, during which time you earn very little.

In the US, the graduate school application process is similar whether you’re applying for a master’s or a PhD . Both require letters of recommendation , a statement of purpose or personal statement , a resume or CV , and transcripts. Programs in the US and Canada usually also require a certain type of standardized test—often the GRE.

Outside the US, PhD programs usually also require applicants to write a research proposal , because students are expected to begin dissertation research in the first year of their PhD.

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How Long Does It Take to Earn a PhD?

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How Long Does It Take to Earn a PhD?

How long is a PhD program? That might be one of the first questions you ask yourself If you are thinking of earning a PhD. You have probably heard a range of years, and that is because how long it takes to earn a PhD depends on a number of factors. Keep reading to learn more!! 

What is a PhD? 

PhD stands for a “Doctorate of Philosophy.” This is an academic degree that qualifies the degree holder to teach their chosen subject at university level or to work in a specialized position in their chosen field. In general, the PhD is the highest level of degree a student can achieve. 

Also see: Top fully funded PhD programs

Why get a PhD? 

A PhD is a serious commitment with a serious return on investment. Here is a list of professional and personal benefits for earning a PhD. 

How long does it take to earn a PhD? 

Earning a PhD usually takes between four and seven years to complete, depending on the type of PhD as well as the schools requirements, the students educational background, and personal progress. Students who take full-time classes can typically finish in four years. A typical PhD program requires anywhere from 60 to 120 semester credit hours . 

Why earning a PhD takes years to earn

Assistantship obligations.

Teaching and research assistantships can be very beneficial for the experience they provide and the potential funding, but they can also be time consuming obligations for PhD students. Therefore, assistantships may affect the amount of time it takes to complete a PhD program. 

Comprehensive examinations

Universities often require students to demonstrate their readiness in a PhD program through comprehensive exams. These comprehensive exams may be known as: 

  • Preliminary examinations
  • Major field examinations
  • Comprehensive exams or “Comps”
  • General examinations

Dissertation

A dissertation is an in-depth research document that serves as the culmination of a doctoral program. It is an important document that demonstrates a student’s original research and contribution to their field of study. 

The dissertation involves conducting extensive research, reviewing previous literature, analyzing data, and presenting your findings in a structured manner. Once the dissertation is completed, it is typically defended orally in front of a committee of faculty members who assess the quality and validity of the research. 

Average PhD timeline

The specific of a PhD timeline carried by college and university. However, the following is a good overview of the average PhD program. 

  • Year 1: Take advanced courses
  • Year 2: Take advanced courses and begin preparing for exams
  • Year 3: Study, take and defend your comprehensive exams and begin researching your dissertation proposal
  • Year 4: Begin working on your dissertation
  • Year 5: Finish and defend your dissertation 

Average PhD completion by focus

According to data from the National Center for Science and Engineering Statistics the average time in years from graduate school entry to doctorate it took students to receive their degree in 2020 in certain fields is listed below. 

  • Life sciences = 6.9 years
  • Physical sciences and earth sciences = 6.3 years
  • Mathematics and computer sciences = 7.0 years
  • Psychology and social sciences = 7.9 years
  • Engineering = 6.8 years
  • Education = 12.0 years
  • Humanities and arts = 9.6 years
  • Other non-S&E fields = 9.3 years

Related : Top 10 PhD in Education programs

How to finish your PhD is less time

Look for accelerated classes.

Accelerated courses are an easy way to reduce the amount of time it takes to finish a PhD. Therefore, look into if your program offers any shorter courses. 

Work on your dissertation throughout the program

Working on your dissertation little by little throughout the program will allow you to speed up your doctoral timeline. In addition, it may reduce the likelihood that you’ll drop out before finishing your final project.

Maintain regular communication with your advisor

Establish regular communication with your advisor or supervisor. Regular meetings can help you receive guidance, address any issues, and ensure you are heading in the right direction.

Seek feedback early and often

Share your work and progress with your advisor, peers, or other trusted individuals often. Then, you should incorporate suggestions and revisions as you go along. This will help you refine your work and avoid major revisions later.  

Maintain a healthy school-life balance

While it is important to be dedicated to your PhD, it’s just as important to maintain a healthy work-life balance. Therefore, be sure to prioritize yourself! While finishing your PhD in less time is a great feat, it is important that you are not sacrificing your well-being while doing so.

Key Takeaways

  • PhD stands for “doctorate of philosophy” and is generally the highest level of degree a student can earn
  • There are many professional and personal benefits to earning a PhD which can lead to a serious return on investment
  • A PhD program typically takes 4-7 years to complete. However, it can take longer or shorter depending on personal circumstances and field of study 
  • With planning and guidance from advisors, students can sometimes complete PhDs in less time

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Frequently asked questions about how long it takes to earn a PhD 

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PhD Admission FAQ

how long is an phd

General Information

When is the application due and how do i apply .

NOW CLOSED- The application is due on  November 30, 2023  at 11:59 PM Pacific Time. 

Apply using the  application portal .

How long does it take to get a PhD in Psychology at Stanford?

The PhD program is designed to be completed in five years of full-time study. Actual time will depend on students' prior background, progress, and research requirements. The minimum residency requirement for the PhD degree is 135 units of completed coursework and research units.

What are the requirements for the PhD degree in Psychology?

Please consult the  PhD Requirements page .

What are the different subfields within the graduate program in Psychology?

  • Affective Science
  • Cognitive Psychology
  • Developmental Psychology
  • Neuroscience
  • Social Psychology

What is the Department's teaching requirement?

PhD students must complete at least five quarters of teaching assistantship (TA) under the supervision of a faculty member. Students are required to attend a TA training workshop in their second year. In addition, students are encouraged to take advantage of department and university teacher training programs. Students for whom English is a second language are expected to acquire sufficient fluency in English. All international students must be approved by  Stanford’s EFS department . 

How many students apply to the Stanford Psychology PhD? How many are admitted? What are the demographics?

Stanford provides public reports with summary data about graduate programs and graduate admissions. Please consult the public dashboards published by Stanford's office of Institutional Research & Decision Support on  doctoral admissions ,  doctoral enrollment and demographics , and  doctoral completion and time-to-degree . 

Is there a standalone Master of Arts program in Psychology?

The Department of Psychology does not offer a terminal Master’s degree program. Current doctoral students within the Department or in another Stanford graduate program may apply to be awarded a Master of Arts in Psychology during the course of their PhD program.

Does your department have a program in Clinical Psychology? Are you accredited by the APA?

No. Our department does not have a program in Clinical Psychology. As such, we are not accredited by the APA.

Do you have any advice about getting into grad school?

The Stanford School of Humanities and Sciences offers an online resource for prospective graduate school applicants:  Guide on Getting Into Grad School . We encourage applicants to take advantage of this resource.

Financial Support

What is the annual cost of attending your program.

All students admitted to the Psychology PhD program receive five years of 12-month funding. Financial support is provided through a combination of fellowship stipend and salary, and assistantship salary and tuition allowance. Information about the cost of attendance and funding options are available from the  Financial Aid Office .

What type of financial support do you offer?

All students admitted to the Psychology PhD program receive five years of 12-month funding. Financial support is provided through a combination of fellowship stipend and salary, and assistantship salary and tuition allowance. Funding is contingent upon satisfactory academic progress. Students are encouraged to pursue fellowships offered by the University and by national organizations, such as the National Science Foundation.

Stanford University also offers the  Knight-Hennessy Scholars  program, designed to build a multidisciplinary community of Stanford graduate students dedicated to finding creative solutions to the world's greatest challenges. The program awards up to 100 high-achieving students every year with full funding to pursue graduate education at Stanford, including the PhD in Psychology. To be considered, you must apply to Knight-Hennessy Scholars and separately apply to the Psychology Department. Note that the Knight-Hennessy Scholars program application deadline is in the spring  before  the autumn application cycle.

Do you offer support for the summer months?

Yes, funding is offered for 12 months a year for 5 full years, including 5 summers.

Preparing for Admission

Am i eligible to apply if my undergraduate major is not in psychology.

An undergraduate major in Psychology is not required; applicants from other backgrounds can apply and be admitted. All applicants should have sufficient foundational knowledge and research experience prior to the program to allow them to go straight into graduate-level coursework and conduct research.

My undergraduate degree was completed outside the United States. Is my degree eligible? 

Please refer to the Stanford Graduate Admission Office's table of  minimum level requirements for international academic credentials . These credential requirements are set by the University and nonnegotiable.

If I have prior graduate work, can it be transferred to the PhD program?

No, the Department of Psychology does not allow the transfer of unit credits from your previous program.

How competitive is admission to the PhD program?

Admission to our program is highly competitive. About 10-15 admits enter the program each year and are chosen from a pool of over 600 applicants. These students are selected on the basis of a strong academic background as demonstrated by previous coursework, research experience, and letters of recommendation. Please be assured that the Department reviews each application very carefully and makes decisions on an individual basis.

The Application Process

How do i apply.

Please visit the  PhD Admissions page  for instructions on how to apply to the Psychology PhD Program, graduate application requirements, and the link to the online application. 

Is there an application fee? If so, can I apply for a fee waiver?

The fee to apply for graduate study at Stanford is $125, see  Application Fee . Fee waivers are available for some applicants. Please visit Graduate Admissions for information on applying for an  Application Fee Waiver .

Can I submit another application to a different department within the University?

You may only apply to one degree program per academic year. However, you may apply concurrently to one departmental program and to a professional school program (law, medicine, or business).

I'm interested in the joint JD/PhD in Law and Psychology - how does it work?

Students interested in the JD/Ph.D. joint degree must apply and gain entrance separately to the School of Law and the Psychology Ph.D. program. Additionally, students must secure permission from each degree program to pursue the joint degree. Interest in both degrees should be noted on the student’s admissions applications and may be considered by the admissions committee of each program. Alternatively, an enrolled student in either the Law School or the Psychology department may apply to add the other degree and undertake the joint degree program, preferably during their first year of study. Students participating in the JD/Ph.D. joint degree program are not eligible to transfer and receive credit for a masters, or other degree, towards the Psychology Ph.D.

Students interested in the MPP/Ph.D. joint degree must apply and gain entrance to the Public Policy program’s MPP degree and the Psychology Ph.D. program. Students should note their interest in both degrees on their graduate admissions applications. Additionally, students must secure permission from each degree program to pursue the joint degree

Which faculty are accepting new students this year?

All active faculty are potentially accepting new students each year. In your application, we ask you to list the top 3 faculty you are most interested in working with. Multiple readers will review your application in full regardless of who you list. 

My institution does not report GPAs on a 4.0 grading scale. How should I report my GPA on the application?

Please do not convert your GPA to a 4.0 grading scale. You should enter “0.00” for the GPA and use the “Unconverted GPA” and “Unconverted GPA System” fields instead. A link to detailed instructions for reporting GPA is located near these fields on the application.

I attended multiple undergraduate institutions. In what order should I list them on the application?

The institution where you earned or expect to earn your Bachelor's degree should be listed as "Post-Secondary Institution 1." The remaining institutions don’t have to follow a particular order. List all institutions that were attended for at least one full academic year. Please note that you must submit a transcript for all courses taken towards your undergraduate degree, including those from your nonprimary institutions.

When should I submit my transcripts if my degree will still be in progress at the time of the application deadline?

The most current version of your unofficial transcript must be submitted as part of your electronic application, even if the grades from your fall term are not available. The absence of these grades will have no impact on the review of your application. If you are admitted and enrolled, we will ask you to submit your final transcript showing all grades and proof of degree conferral.

Should I submit official transcripts?

At the time of your initial application, please only submit your unofficial transcripts. Submit the unofficial transcripts as part of your electronic application, per the instructions in the application portal. A short list of applicants who move forward to the next stage of the review process will be contacted with instructions for submitting official transcripts at a later stage. 

It may be helpful to understand the difference.  Unofficial transcripts  are transcripts issued by your college or university directly to you, the student, which you then submit to Stanford for review. Official transcripts  are transcripts issued by your college or university directly to Stanford University, usually by secure electronic transfer and sometimes in hard copy in signed and sealed envelopes. The key difference is that an  official transcript  has never been directly handled by the applicant.

Do you have a minimum GPA score?

We do not require applicants to have a minimum GPA for consideration, and we do not release information about the average GPAs of accepted students. As a guideline, successful applicants typically earn undergraduate cumulative GPAs among the top of their class. However, please keep in mind that admission to our graduate program depends on a combination of factors, and all areas of a student’s application are weighed similarly when applications are reviewed. If our research areas meet your educational goals, we encourage you to submit an application. 

May I contact the faculty directly during the application process?

Applicants are not prohibited from reaching out to faculty directly during the application cycle. However, please understand that our faculty are extremely busy, and it is quite possible that you will receive either a very short response or no response at all. This does not mean the faculty are not interested in your application. All applications will be read and reviewed in full during the formal review process. Note that per Department policy, all faculty are potentially accepting graduate students in any given cycle, so you do not need to contact faculty in advance to see if that specific mentor is accepting students for the coming year.

Can I meet with Department staff either by phone or email before I apply to discuss my application materials or ask general questions about the program?

No, the Department staff do not have meetings with or provide individualized advising for prospective applicants. Please understand that this is a matter of bandwidth and equity. We do not have the ability to offer personalized service to all interested applicants, so we do not offer them at all. By Department policy, our staff do not provide any evaluative feedback on prospective applicants' materials, so please do not contact us with CVs, academic histories, etc to request feedback or ask about odds for acceptance. For support in crafting your application, we recommend that you turn to your existing network of mentors (e.g., your letter writers) and/or the resources offered by your current or prior academic institution(s).

TOEFL and GRE

Is the general gre required is the subject gre required.

No, the Stanford Psychology PhD program does not require the general GRE or the subject GRE. We will not be collecting any information related to GRE exam scores on the application. Please do not submit GRE scores to Stanford for our program.

What is the TOEFL exam, and am I required to take it?

The TOEFL is a standardized test of English language proficiency. Per University policy, the TOEFL exam is required for international, non-native English speakers who apply to any Stanford graduate program. 

The TOEFL score requirements are waived for international non-native English speakers who have received a Bachelor’s or Master’s degree from an institution in the United States or another English-speaking country. Therefore, applicants with these degrees from the U.S., Australia, Canada (except Quebec), New Zealand, Singapore, Ireland, and the United Kingdom (England, Scotland, Northern Ireland, Wales) are exempt from taking the TOEFL and do not need to submit the TOEFL waiver request form.

When should I take the TOEFL?

The TOEFL must be taken by the published application deadline. 

What is the minimum TOEFL score required for admission?

Please visit the website of  Stanford's Office of Graduate Admissions  for more information on the University’s minimum requirements.

If my TOEFL score falls below the University’s minimum, am I still eligible to apply?

Yes, you may still apply. If your TOEFL scores fall below the University's minimum requirements and you are admitted, Stanford may require you to take an English placement exam and/or English classes.

May I submit the IELTS instead of the TOEFL to demonstrate English proficiency?

The IELTS is not accepted at Stanford University; only the TOEFL is accepted to provide proof of proficiency in English.

How do I request a TOEFL exemption or waiver?

For all questions related to TOEFL exemptions or waivers please refer to the website of  Stanford’s Office of Graduate Admissions . Please note that the central office makes all final decisions regarding TOEFL waivers; the Department of Psychology is not involved in the approval of TOEFL waivers.

How do I check the status of my TOEFL scores?

Log in to your application account. It may take up to two weeks after submitting your application or sending the scores (whichever occurs later) for your official scores to show as received. Processing may be delayed or halted if the name or birthdate on the score report does not exactly match the information on your application.

Why does my TOEFL status show as “Not Applicable” even though I submitted a TOEFL score?

This may be because you listed English as your first language in the application. Please note that “first language” refers to your native language.

Is there a department code for ETS to use in order to send in my scores?

No, there are no individual department code. Use the Stanford University score recipient code  4704  to send your TOEFL scores.

Statements of Purpose

How long should my statement of purpose be.

We strongly recommend that your statement of purpose be around two pages in length.

What should I include in my statement of purpose?

Please consult the Stanford Graduate Admissions  FAQ page  for more information on the Statement of Purpose.

Letters of Recommendation

When are the letters of recommendation due.

The letters of recommendation have the same deadline as the rest of the application. This year, the deadline is  November 30, 2023.

How many recommendations do I need, and who should I ask to be my recommenders?

Applicants need three recommendations from faculty or others qualified to evaluate your potential for graduate study. At least one evaluation and letter should be from a faculty member at the last school you attended as a full-time student (unless you have been out of school for more than five years). Substitutions for faculty recommendations may include work associates or others who can comment on your academic potential for graduate work.

My recommender will not be able to submit his/her letter by the application deadline. Will my application still be considered?

Letters of recommendation must be submitted by the application deadline. As such, we strongly encourage you to contact your recommenders directly to remind them of our deadline. If your recommender misses the deadline, please contact  psych-admissions [at] stanford.edu (psych-admissions[at]stanford[dot]edu) . Depending on the circumstances, Department staff may collect the letter via email and forward it to the faculty to add to your file. That said, the program expects applicants to do everything possible to ensure that letters are submitted on time via the secure online system.

Can my recommenders submit their letters via email, fax, or postal service?

No. Recommenders must submit their letters via Stanford’s online recommender system.

My recommenders are having technical difficulties with the online letters of recommendation process. Who should they contact?

Should any of your recommenders experience technical difficulties with the online letters of recommendation process, please refer them to our application database provider's letters of recommendation help page or have them submit a Help Request Form directly to our application database provider.

Additional Materials and Updates

I realized i made a mistake on my application and/or uploaded the wrong version of my documents. what do i do.

Depending on the timing and the nature of the error, our staff may be able to correct your application. Please send an email to  psych-admissions [at] stanford.edu (psych-admissions[at]stanford[dot]edu) . Include your full name, a complete description of the error, and attach the correct version of the file (if applicable). The Department reserves the right to decline to update your application after the deadline has passed. Requests will be reviewed on a case-by-case basis.

If you need to change your recommenders, please use the Activity Status Page. Note: The order of recommenders cannot be changed.

May I submit a resume/CV, list of publications, etc. as part of my application?

Applicants are permitted to upload one additional document to the online application, under the “Document Uploads” section.

Is there an interview process? 

Yes, our faculty interview prospective students before making final admission decisions. 

When are the interviews?

The interviews for the current admissions cycle are likely to be in February 2021. We anticipate that all interviews will take place virtually.

When can I expect to find out the decision on my application?

The Department of Psychology aims to issue all offers of admission to PhD degree applicants by the end of March.

I applied in a prior cycle and was not admitted. Can I apply again?

Applicants who applied in prior cycles and were previously not admitted are welcome to reapply if they can demonstrate significant progress made since they last applied. We encourage you to use your Statement of Purpose to explain this progress.

All documents must be resubmitted with a new application. We do not keep records from past applications.

I still have questions!

If you have questions that are not answered on this page or the Stanford Graduate Admissions  FAQ page , please email  psych-admissions [at] stanford.edu (psych-admissions[at]stanford[dot]edu) . If your questions are already covered on this page, your email may not receive a response.

Note that our Department staff are experts on the logistics and administration of the application, but do not answer questions related to research topics or faculty fit. Per Department policy, Department staff will not offer any evaluative feedback on application materials or applicants' academic background. Unfortunately, due to the extremely high volume of inquiries, we cannot provide individual status updates for applicants at any point in the process.

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How Long Does a PhD Take?

Philosophy, physics, public health—whatever your passion may be, it’s grown enough to bring you to where you are right now: researching PhD programs on the internet. 

You know your heart’s in it but is your calendar on the same page? How long does a PhD take exactly?

As you may have expected, there’s no one-size-fits-all answer to that question. That’s because a PhD program varies widely between programs and course loads. However, to give you a better idea of what to expect in terms of the time commitment, you’ll want to factor in a timeline ranging anywhere from 5 to 8 years.

In this article, we’ll break that number down a bit more, outlining factors that may alter the overall time spent on your post-graduate studies. From there, you’ll be able to make a more informed choice about whether pursuing a PhD is right for you. 

What is the Average Time it Takes to Get a PhD?

5.8 years—that’s the average amount of time a student spends on their PhD program, according to a US News report on the Survey of Earned Doctorates in 2017. The specific field of study, however, may tilt this average higher or lower. Based on their findings, for example, programs in the humanities took longer, averaging closer to 7.1 years to obtain a PhD. 1

So why do some students take longer than others? This can be due to a variety of factors. Reports show that the average time it takes to get a PhD is getting longer, usually due to the obligations the student has on top of their course load. In years past, students could expect a standard 5-year PhD program. Now, however, there may be more competing priorities that are vying for their attention. 2

Today, PhD students tend to be a bit of mixed batch—from those emerging right out of graduate school to those obtaining their doctorate while still working or maintaining a family. Because of these extra obligations, students may:

  • Opt for a less rigorous course load each semester
  • Take a semester off entirely to focus on a career opportunity or family
  • Be faced with less time to work on their dissertation

Regardless of the field of study, factors such as these may cause some PhD programs to extend longer than others.

A Rough Timeline of the PhD Program

If you’re struggling to wrap your head around seven or more years spent in a PhD program, then it might be helpful to lay out a timeline of what the average PhD student spends their time on each academic year. 3

Keep in mind that the specific trajectory may change from program to program. To give you a general idea, however, here’s an overview of a typical PhD track: 

  • Years 1-3 – During this time, students will usually take a variety of elective courses paired with some research components. At this point, they may work as a teaching aid or research assistant to help offset the costs of their program and to earn valuable, hands-on experience within the field.
  • Passing a comprehensive examination – After their coursework has been completed, students will often be required to put their proficiency in their field to the test by undergoing a detailed evaluation, typically in the form of a written or oral exam. Preparing for this kind of exam can often take the better part of a year.
  • Year 4+  – Once a PhD candidate has succeeded in passing the comprehensive exam, they typically begin their research and dissertation. Depending on the field, this process can take several years and is typically subject to reviews and standardized requirements. Finally, most candidates must have their dissertation evaluated and approved by a panel of professors in order for their doctorate degree to be officially granted. 

What Else to Consider Before Pursuing a PhD

Time isn’t the only thing you should consider before embarking on a PhD program but it is closely linked to a few other factors you’ll want to consider, such as:

  • How long you’ll want to live in a particular place
  • How long you’re willing to commit to studying a particular subject
  • What institution and faculty members will help make sure your time is well spent

Before you take the plunge into a PhD program be sure to weigh out the pros and cons of things such as:

  • Topic – If you’re going to invest nearly half a decade in a particular subject matter, you’ll want to make sure it’s something you’re truly committed to. PhD programs can be quite varied, so don’t settle for something unless it’s the right fit for your particular interests. 
  • Location – Unless you’re pursuing a doctorate degree online, location will likely come into play when deciding where to advance your studies. In addition to meeting your academic interests, the university at which you pursue your PhD should be located in a city or town you’d be comfortable living in for an extended period of time. 
  • Faculty support – You may think you’ve found the perfect university but have you gotten the chance to learn more about the faculty members who are at the forefront of your program? Since you’ll typically work closely with an academic supervisor throughout your PhD program, make sure your research interests are supported by people who you get along well with—and who are experts in your field. 

Explore PhD Programs With Alliant International University

Now that you’ve got a clearer idea of a typical PhD timeline, you may be ready to take the next step forward. Finding a program that fits your interests and your schedule is easy when you explore the options available to you at Alliant International University. 

Here at Alliant we offer a number of PhD programs in Clinical Psychology, Leadership, Industrial and Organizational Psychology, and Psychology, Public Policy, and Law. Plus, you can choose whether to study online or in person at one of our six campuses in California. 

For better insight into our PhD, PsyD, DBA, and JD programs, check out our page that details the specifics of our doctoral degrees today. 

Sources: 

  •  “How Long Does It Take to Get a PhD Degree?” US News. August 12, 2019. https://www.usnews.com/education/best-graduate-schools/articles/2019-08… . Accessed January 31, 2021.
  •  “What Is the Average Time to Obtain a PhD?” GradSchoolHub. June 3, 2021. https://www.gradschoolhub.com/faqs/what-is-the-average-time-to-obtain-a… . Accessed January 31, 2021.
  •  “What Is the Average Time to Obtain a PhD?” GradSchoolHub. June 3, 2021. https://www.gradschoolhub.com/faqs/what-is-the-average-time-to-obtain-a… Accessed January 31, 2021. 

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What is a PhD?

As the highest degree level achievable at university, completing a PhD shows that you've made a meaningful new contribution to your chosen research field

PhDs at a glance

  • Involves three or four years of full-time study, or up to seven part time.
  • Typically undertaken after achieving a Masters degree.
  • Can either be funded or self-funded.
  • Assessed through a written thesis and oral exam.
  • Many Doctoral graduates choose to pursue an academic or research career.

What is the meaning of PhD?

The term PhD or Doctorate of Philosophy is an abbreviation of the Latin phrase 'philosophiae doctor'.

A PhD degree typically involves students independently conducting original and significant research in a specific field or subject, before producing a publication-worthy thesis.

While some Doctorates include taught components, PhD students are almost always assessed on the quality and originality of the argument presented in their independent research project.

How long is a PhD in the UK?

Full-time PhDs usually last for three or four years, while part-time PhDs can take up to six or seven. However, the thesis deadline can be extended by up to four years at the institution's discretion. Indeed, many students who enrol on three-year PhDs only finish their thesis in their fourth year.

While most PhD studentships begin in September or October, both funded and self-funded PhDs can be undertaken at any point during the year.

If you're planning on studying for a PhD abroad, take a look at our individual country profiles .

Do I need a Masters to do a PhD?

The majority of institutions require PhD candidates to possess a Masters degree , plus a Bachelors degree at 2:1 or above. However, some universities demand only the latter, while self-funded PhD students or those with significant professional experience may also be accepted with lower grades.

You may need to initially register for a one or two-year Master of Philosophy (MPhil) or Master of Research (MRes) degree rather than a PhD. If you make sufficient progress, you and your work will then be 'upgraded' to a PhD programme. If not, you may be able to graduate with a Masters degree.

If you need an MPhil or MRes before enrolling on your PhD, search Masters degrees .

What does a PhD involve?

A standard PhD degree is typically split into three stages. A three-year PhD may follow this pattern:

  • First year - You'll meet with your supervisor to discuss your research proposal and agree an action plan with deadlines. You'll then complete your literature review, in which you'll evaluate and critique existing works to inform the direction of your project and ensure that your research will be original.
  • Second year - Your focus will shift to gathering results and developing your thesis, and potentially begin writing chapters of your thesis. You may also present your results and ideas at academic conferences, gain teaching experience, collaborate with other students on similar projects, communicate the benefits of your research to the general public through workshops, lectures and presentations, or submit work for publication in an academic journal or book.
  • Third year - Primarily involves writing your thesis, though your research may still be in progress. After your supervisor gives their approval, you'll submit your thesis before undertaking a one to three-hour oral exam ( viva voce ) in which you'll discuss and defend your thesis in the presence of at least one internal and external examiner.

How do I find a PhD?

As a PhD is different to other degrees, you're committing to more than simply an advanced qualification. You've chosen to engage in a large-scale independent research project and so you'll need to take into account a range of factors that will drive your search.

A methodical approach to the process is required and you'll need to consider the subject you're interested in carrying out research in and the type of Doctorate you're looking for, making sure this is the right project for you. Only when you're fully prepared and have a good idea of your research proposal should you search for PhD opportunities .

What other types of Doctorate are there?

Alternative types of PhD include:

  • Higher Doctorate - These are usually granted on the recommendation of a committee of internal and external examiners, which assesses a portfolio of published, peer-reviewed research you've undertaken over the course of many years. This type of Doctorate is usually for those with several years of academic experience. Common award titles include the Doctor of Civil Law (DCL), Doctor of Divinity (DD), Doctor of Literature/Letters (DLit/DLitt/LitD/LittD), Doctor of Music (DMus/MusD), Doctor of Science (DS/SD/DSc/ScD) and Doctor of Law (LLD).
  • Integrated/New Route PhD - This four-year PhD course is offered by over 30 universities and involves taking a one-year MRes before studying a three-year PhD. It combines taught elements with independent research, allowing students to learn different methodologies while building their transferable skills.
  • Professional Doctorate - Geared towards students of vocational subjects such as medicine, education and engineering, professional Doctorates are focused on teaching and so normally involve smaller research projects and thesis component. They're often favoured by those aiming for a career outside of academia and are usually supported by employers.

How much does a PhD cost?

Tuition fees vary, but usually fall between £3,000 and £6,000 per year for UK students and those from the European Union (EU) with settled status. UK Research Councils pay universities £4,596 per year (from 2022/23) on behalf of each funded PhD student, so this gives a good indication of the average figure.

For EU students looking to pursue a Doctorate in 2022/23, you'll need to have gained settled or pre-settled status to be eligible for student finance - see PhD loans .

Non-EU students may pay considerably more for their tuition fees.

Despite this, many PhD students are now part or fully funded - scholarships and bursaries are widely available, and particular attention should be paid to Research Council grants .

PhD studentships and assistantships involving a mixture of research and teaching are also common, with scientific studentships usually paid at a higher rate.

How do I apply for a PhD?

Some students propose their own research area and apply for funding, while in some cases a supervisor may already have funding for a project and advertise it like a job. When making a PhD application, you'll typically be asked to submit:

  • an academic CV
  • your academic transcripts
  • two or three academic references
  • a personal statement
  • a research proposal.

International students without settled UK status looking to study certain courses in medicine, mathematics, engineering and material sciences are required to comply with the Academic Technology Approval Scheme (ATAS) . This involves undergoing a security clearance process with the Foreign, Commonwealth & Development Office. International students may also have to prove their English proficiency.

What can I do next?

Your ability to critically analyse, display intellectual maturity, and research independently and honestly is highly valued within academia and the workplace.

Many students who undertake a PhD get an academic job or become an industry researcher, possibly following the PhD with postdoctoral study, then a fellowship or lectureship.

Other career options will depend on your study area.

Discover what a PhD degree can lead to at your PhD, what next?

Find out more

  • Consider your PhD options at 5 routes to getting a Doctorate .
  • Get help with choosing your PhD supervisor .
  • Explore funding postgraduate study .

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How Long Does It Take to Get a PhD in Psychology?

Kendra Cherry, MS, is a psychosocial rehabilitation specialist, psychology educator, and author of the "Everything Psychology Book."

how long is an phd

Emily is a board-certified science editor who has worked with top digital publishing brands like Voices for Biodiversity, Study.com, GoodTherapy, Vox, and Verywell.

how long is an phd

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  • How Long Will It Take?

Before You Earn PhD in Psychology

Which type of degree should you get, can you finish your degree early.

Just how long does it take to get a PhD in psychology? The answer can vary depending on your program, educational background, and academic schedule. In general, most PhD psychology programs take anywhere from five to seven years to complete.

Learning more about what it takes to get a doctorate in psychology can help you better plan your educational and career journey.

At a Glance

Getting a PhD in psychology can take several years of graduate study. If you are thinking about becoming a psychologist, research your degree options to figure out what type of degree you need and how long it will take to enter your chosen profession. No matter what you decide, plan to spend anywhere from three to seven years in graduate school to earn a doctorate.

How Long Will It Take to Get a Doctorate Degree?

How long it takes to get a doctorate in psychology depends on various factors, including the type of degree you have selected, your educational background, and the individual doctorate program in which you have enrolled.

Most doctorate programs in psychology take between four to seven years to complete.

PhD in Psychology

Most PhD programs require at least five to seven years to complete. These programs often follow a scientist-practitioner model that trains professionals both in research and clinical practice.

In addition to regular coursework, you may also be expected to complete an internship or supervised residency. The program usually culminates in completing an original research project or dissertation.

PsyD Degree

Most PsyD programs require between four to six years to complete. A PsyD is a degree designed to train professionals to apply psychological knowledge to treating and helping people in real-world settings.

According to the American Psychological Association, PsyD programs focus more on applying psychological science, usually in the form of service.  

Most EdD programs require between three to five years to complete. EdD programs are often focused on psychology, counseling, or counselor education. They explore topics that involve both education and psychology.

It is important to note that many applicants to EdD programs already hold a master's degree in a related field. This differs from applicants to PhD and PsyD programs, who often begin their program of study with a bachelor's degree.

Before you begin your academic journey, it is a good idea to look at just how long it will take you to complete your degree. The amount of time it will take can depend upon various factors, including:

  • Your chosen specialty area
  • The program you select
  • The course load you can take each semester

A doctorate-level degree in psychology is required to work in many job areas, including as a licensed clinical psychologist or counseling psychologist. According to the American Psychological Association, a doctorate degree is also often required in fields such as school psychology or health psychology .

So how long does it take to get a PhD in Psychology ? First, it is essential to realize that the degree requirements can vary depending on the field that you decide to pursue. A PhD, or Doctor of Philosophy degree is not necessarily your only option. In some cases, you might want also to consider the PsyD (Doctor of Psychology) or the EdD (Doctor of Education) degree options.

The PhD, PsyD, and EdD are all great options, but don't let how long it takes to complete be the primary deciding factor. Before you decide to get a doctorate degree, start by deciding which type of degree is most suited to your professional goals.

If you want to conduct research:

A PhD in Psychology tends to focus on a research-based model of education. People with a PhD in Psychology are qualified for a wide range of teaching, research, and clinical positions in colleges, universities, hospitals, government offices, and private mental health practices.

If you want to treat mental health issues:

The PsyD degree option generally focuses on a practitioner-based model of education. Individuals with a PsyD degree can also teach or conduct psychology research, but they frequently work in applied settings to provide direct mental health services.

If you want to apply psychology to help students:

Finally, there is also a third doctorate option that you might also want to consider depending on your career goals. If you are interested in working as a school psychologist or in a related educational field, the EdD, or Doctor of Education, is a possible option.

Despite the years of work, earning your PhD, PsyD, or EdD can be well worth the effort. The U.S. Bureau of Labor Statistics suggests that workers with a doctoral or education specialist degree in clinical, counseling, and school psychology will find the strongest job opportunities.

Generally, if you have a strong background in psychology and have completed all of the necessary prerequisites, you can finish your doctorate sooner than students who have not taken the prerequisite courses.

Carefully planning your degree can also help ensure you complete the program requirements quickly.

Be sure you have a clear idea of what you want to do with your psychology degree once you've completed it. Do you want to teach, or is research more appealing to you? Are you interested in seeing clients, or are you planning to combine your training in psychology with another field, such as law or medicine?

If you need help deciding, make an important with an academic advisor at your school. They can help you explore your options and answer any questions you may have.

What This Means For You

No matter the degree you decide to pursue, earning a doctorate in psychology requires a significant investment of time, money, and effort. Because of this, it is essential to carefully consider your goals before deciding on a graduate program. You should also think about whether you need a doctorate or if a master's might be more appropriate.

Gee DG, DeYoung KA, McLaughlin KA, et al. Training the next generation of clinical psychological scientists: A data-driven call to action .  Annu Rev Clin Psychol . 2022;18:43-70. doi:10.1146/annurev-clinpsy-081219-092500

Loyola University. Can I get my Psy.D. without a Master's in Psychology?

American Psychological Association. Doctoral degrees in psychology: How are they different, or not so different ?

Franklin University. Is getting a Doctorate in Education worth it?

American Psychological Association. Frequently asked questions about graduate school .

Bureau of Labor Statistics. Psychologists . Occupational Outlook Handbook .

Carr, A. Clinical Psychology: An Introduction . London: Routledge; 2012.

Kuther, TL. The Psychology Major's Handbook . Boston, MA: Cengage Learning; 2016.

By Kendra Cherry, MSEd Kendra Cherry, MS, is a psychosocial rehabilitation specialist, psychology educator, and author of the "Everything Psychology Book."

Frequently Asked Questions for PhD Applicants

If you have questions about the application process, please consult the Application FAQ

Program FAQ

  • When is the application deadline?  December 7, 2023 11:59 PM PST is the application deadline for Autumn 2024-2025.
  • I will have just earned my bachelor’s degree before starting graduate study at Stanford. Should I apply to the MS or the PhD program?  You should apply to the degree program that can fulfill your ultimate degree goal. For example, if obtaining a PhD is your ultimate goal, you should apply directly to the PhD program.
  • Do I need to have a master’s degree before applying to the PhD program?  No; the minimum degree requirement is a bachelor’s degree. Students who enter the PhD program may opt to pursue the master’s degree along the way to earning the PhD.
  • If I apply to the PhD program but do not get admitted, will I be considered for the MS program?   The Electrical Engineering Department does not consider PhD applicants not admitted into the PhD program for the MS program. 
  • If I am admitted and enrolled in the MS program, may I enter the PhD program later?  Admission to the PhD program is possible only through the  annual general admissions process . Current MS students must reapply through this process to be considered for the PhD program.
  • May I apply for a start term other than autumn? No; applications are reviewed on an annual basis for autumn quarter start only.
  • How long does it take to complete the PhD?  Typical completion time for the PhD program is 5-7 years.
  • How important is it to contact faculty before I apply?  Contact with faculty members is not a required part of the application process nor does it guarantee admission to our graduate program. Admissions decisions are made by the Admissions Committee, not by individual faculty members.
  • Is financial assistance available for PhD students?  Yes; all PhD students who maintain satisfactory academic progress receive full financial support for the duration of the doctoral program. For more information, please see  Financial Assistance for PhD Students .
  • What are the minimum GPA requirements for admission?  Applicants do not need to meet any minimum grade point average (GPA) to secure admission, and we do not release information about average GPAs of admitted students. As a guideline, successful applicants typically earn undergraduate cumulative GPAs among the top of their class. However, please keep in mind that admission to our graduate programs depends on a combination of factors, and all areas of a student’s application are weighed when applications are reviewed.
  • Am I eligible to apply if my undergraduate major is not Electrical Engineering?  Yes; students who meet the minimum degree requirements with a strong technical background in engineering, physical sciences, or mathematics are welcome to apply. A bachelor's degree in electrical engineering is not strictly required.
  • Are specific prerequisite courses required for admission?  No; we advise prospective applicants to review the  EE Graduate Handbook  and the  Stanford Course Catalog  to evaluate what prerequisites are needed for graduate-level courses in your area(s) of interest.
  • What is the minimum level of study required of international applicants from an academic institution outside of the U.S.?  Please refer to  Stanford Graduate Admissions | International Applicants  for eligibility guidelines related to study outside of the U.S.
  • What is the process for transferring to the PhD program from another institution?  Students who wish to transfer to our PhD program from another institution must complete the same application procedure as new applicants. If you are admitted and enrolled, you may request to transfer up to 45 units of coursework from your previous institution toward the PhD degree requirements at Stanford, by following the procedures for  Graduate Residency Credit . Students must complete one quarter at Stanford before requesting to transfer units, and all transferred units are subject to approval by the Registrar’s Office.
  • If I am admitted to a EE graduate program, can my admission be deferred?  The Department greatly discourages deferral of matriculation dates.  Deferrals are granted only to PhD applicants, and only in exceptional circumstances such as for US military service or visa issues for students arriving from designated countries.  Admitted students wishing to defer admission must send a written request (along with documentation if possible) to  [email protected] . Requests will be reviewed by the Admissions Committee. MS and Coterm applicants cannot defer admission dates.

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How Long Does It Take to Get a Ph.D. Degree?

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Earning a Ph.D. from a U.S. grad school typically requires nearly six years, federal statistics show.

how long is an phd

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A Ph.D. is most appropriate for someone who is a “lifelong learner.” 

Students who have excelled within a specific academic discipline and who have a strong interest in that field may choose to pursue a Ph.D. degree. However, Ph.D. degree-holders urge prospective students to think carefully about whether they truly want or need a doctoral degree, since Ph.D. programs last for multiple years.

According to the Survey of Earned Doctorates, a census of recent research doctorate recipients who earned their degree from U.S. institutions, the median amount of time it took individuals who received their doctorates in 2017 to complete their program was 5.8 years. However, there are many types of programs that typically take longer than six years to complete, such as humanities and arts doctorates, where the median time for individuals to earn their degree was 7.1 years, according to the survey.

Some Ph.D. candidates begin doctoral programs after they have already obtained master’s degrees, which means the time spent in grad school is a combination of the time spent pursuing a master’s and the years invested in a doctorate. In order to receive a Ph.D. degree, a student must produce and successfully defend an original academic dissertation, which must be approved by a dissertation committtee. Writing and defending a dissertation is so difficult that many Ph.D. students drop out of their Ph.D. programs having done most of the work necessary for degree without completing the dissertation component. These Ph.D. program dropouts often use the phrase “ all but dissertation ” or the abbreviation “ABD” on their resumes.

According to a comprehensive study of  Ph.D. completion rates  published by The Council of Graduate Schools in 2008, only 56.6% of people who begin Ph.D. programs earn Ph.D. degrees.

Ian Curtis, a founding partner with H&C Education, an educational and admissions consulting firm, who is pursuing a Ph.D. degree in French at Yale University , says there are several steps involved in the process of obtaining a Ph.D. Students typically need to fulfill course requirements and pass comprehensive exams, Curtis warns. “Once these obligations have been completed, how long it takes you to write your dissertation depends on who you are, how you work, what field you’re in and what other responsibilities you have in life,” he wrote in an email. Though some Ph.D. students can write a dissertation in a single year, that is rare, and the dissertation writing process may last for several years, Curtis says.

[ READ: What Is a Doctorate or a Doctoral Degree?  ]

Curtis adds that the level of support a Ph.D. student receives from an academic advisor or faculty mentor can be a key factor in determining the length of time it takes to complete a Ph.D. program. “Before you decide to enroll at a specific program, you’ll want to meet your future advisor,” Curtis advises. “Also, reach out to his or her current and former students to get a sense of what he or she is like to work with.”

Curtis also notes that if there is a gap between the amount of time it takes to complete a Ph.D. and the amount of time a student’s funding lasts, this can slow down the Ph.D. completion process. “Keep in mind that if you run out of funding at some point during your doctorate, you will need to find paid work, and this will leave you even less time to focus on writing your dissertation,” he says. “If one of the programs you’re looking at has a record of significantly longer – or shorter – times to competition, this is good information to take into consideration.”

Pierre Huguet, the CEO and co-founder of H&C Education, says prospective Ph.D. students should be aware that a Ph.D. is designed to prepare a person for a career as a scholar. “Most of the jobs available to Ph.D. students upon graduation are academic in nature and directly related to their fields of study: professor, researcher, etc.,” Huguet wrote in an email. “The truth is that more specialization can mean fewer job opportunities. Before starting a Ph.D., students should be sure that they want to pursue a career in academia, or in research. If not, they should make time during the Ph.D. to show recruiters that they’ve traveled beyond their labs and libraries to gain some professional hands-on experience.”

Jack Appleman, a business writing instructor, published author and Ph.D. candidate focusing on organizational communication with the  University at Albany—SUNY , says Ph.D. programs require a level of commitment and focus that goes beyond what is necessary for a typical corporate job. A program with flexible course requirements that allow a student to customize his or her curriculum based on academic interests and personal obligations is ideal, he says.

[ READ: Ph.D. Programs Get a Lot More Practical.  ]

Joan Kee, a professor at the University of Michigan  with the university’s history of art department, says that the length of time required for a Ph.D. varies widely depending on what subject the Ph.D. focuses on. “Ph.D. program length is very discipline and even field-specific; for example, you can and are expected to finish a Ph.D, in economics in under five years, but that would be impossible in art history (or most of the humanities),” she wrote in an email.

Jean Marie Carey, who earned her Ph.D. degree in art history and German from the  University of Otago  in New Zealand, encourages prospective Ph.D. students to check whether their potential Ph.D. program has published a timeline of how long it takes a Ph.D. student to complete their program. She says it is also prudent to speak with Ph.D. graduates of the school and ask about their experience.

Bennett urges prospective Ph.D. students to visit the campuses of their target graduate programs since a Ph.D. program takes so much time that it is important to find a school that feels comfortable. She adds that aspiring Ph.D. students who prefer a collaborative learning environment should be wary of graduate programs that have a cut-throat and competitive atmosphere, since such students may not thrive in that type of setting.

[ READ: 4 Fields Where Doctorates Lead to Jobs.  ]

Alumni of Ph.D. programs note that the process of obtaining a Ph.D. is arduous, regardless of the type of Ph.D. program. “A Ph.D. is a long commitment of your time, energy and financial resources, so it’ll be easier on you if you are passionate about research,” says Grace Lee, who has a Ph.D. in neuroscience and is the founder and CEO of Mastery Insights, an education and career coaching company, and the host of the Career Revisionist podcast.

“A Ph.D. isn’t about rehashing years of knowledge that is already out there, but rather it is about your ability to generate new knowledge. Your intellectual masterpiece (which is your dissertation) takes a lot of time, intellectual creativity and innovation to put together, so you have to be truly passionate about that,” Lee says.

Erin Skelly, a graduate admissions counselor at the IvyWise admissions consulting firm, says when a Ph.D. students struggles to complete his or her Ph.D. degree, it may have more to do with the student’s academic interests or personal circumstances than his or her program.

“The time to complete a Ph.D. can depend on a number of variables, but the specific discipline or school would only account for a year or two’s difference,” she wrote in an email. “When a student takes significantly longer to complete a Ph.D. (degree), it’s usually related to the student’s coursework and research – they need to take additional coursework to complete their comprehensive exams; they change the focus of their program or dissertation, requiring extra coursework or research; or their research doesn’t yield the results they hoped for, and they need to generate a new theory and conduct more research.”

Skelly warns that the average completion time of a Ph.D. program may be misleading in some cases, if the average is skewed based on one or two outliers. She suggests that instead of focusing on the duration of a particular Ph.D. program, prospective students should investigate the program’s attritition and graduation rates.

“It is worthwhile to look at the program requirements and the school’s proposed timeline for completion, and meet current students to get their input on how realistic these expectations for completion are,” Skelly says. “That can give you an honest idea of how long it will really take to complete the program.”

Searching for a grad school? Access our  complete rankings  of Best Graduate Schools.

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Tips for writing a PhD dissertation: FAQs answered

From how to choose a topic to writing the abstract and managing work-life balance through the years it takes to complete a doctorate, here we collect expert advice to get you through the PhD writing process

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Embarking on a PhD is “probably the most challenging task that a young scholar attempts to do”, write Mark Stephan Felix and Ian Smith in their practical guide to dissertation and thesis writing. After years of reading and research to answer a specific question or proposition, the candidate will submit about 80,000 words that explain their methods and results and demonstrate their unique contribution to knowledge. Here are the answers to frequently asked questions about writing a doctoral thesis or dissertation.

What’s the difference between a dissertation and a thesis?

Whatever the genre of the doctorate, a PhD must offer an original contribution to knowledge. The terms “dissertation” and “thesis” both refer to the long-form piece of work produced at the end of a research project and are often used interchangeably. Which one is used might depend on the country, discipline or university. In the UK, “thesis” is generally used for the work done for a PhD, while a “dissertation” is written for a master’s degree. The US did the same until the 1960s, says Oxbridge Essays, when the convention switched, and references appeared to a “master’s thesis” and “doctoral dissertation”. To complicate matters further, undergraduate long essays are also sometimes referred to as a thesis or dissertation.

The Oxford English Dictionary defines “thesis” as “a dissertation, especially by a candidate for a degree” and “dissertation” as “a detailed discourse on a subject, especially one submitted in partial fulfilment of the requirements of a degree or diploma”.

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The title “doctor of philosophy”, incidentally, comes from the degree’s origins, write Dr Felix, an associate professor at Mahidol University in Thailand, and Dr Smith, retired associate professor of education at the University of Sydney , whose co-authored guide focuses on the social sciences. The PhD was first awarded in the 19th century by the philosophy departments of German universities, which at that time taught science, social science and liberal arts.

How long should a PhD thesis be?

A PhD thesis (or dissertation) is typically 60,000 to 120,000 words ( 100 to 300 pages in length ) organised into chapters, divisions and subdivisions (with roughly 10,000 words per chapter) – from introduction (with clear aims and objectives) to conclusion.

The structure of a dissertation will vary depending on discipline (humanities, social sciences and STEM all have their own conventions), location and institution. Examples and guides to structure proliferate online. The University of Salford , for example, lists: title page, declaration, acknowledgements, abstract, table of contents, lists of figures, tables and abbreviations (where needed), chapters, appendices and references.

A scientific-style thesis will likely need: introduction, literature review, materials and methods, results, discussion, bibliography and references.

As well as checking the overall criteria and expectations of your institution for your research, consult your school handbook for the required length and format (font, layout conventions and so on) for your dissertation.

A PhD takes three to four years to complete; this might extend to six to eight years for a part-time doctorate.

What are the steps for completing a PhD?

Before you get started in earnest , you’ll likely have found a potential supervisor, who will guide your PhD journey, and done a research proposal (which outlines what you plan to research and how) as part of your application, as well as a literature review of existing scholarship in the field, which may form part of your final submission.

In the UK, PhD candidates undertake original research and write the results in a thesis or dissertation, says author and vlogger Simon Clark , who posted videos to YouTube throughout his own PhD journey . Then they submit the thesis in hard copy and attend the viva voce (which is Latin for “living voice” and is also called an oral defence or doctoral defence) to convince the examiners that their work is original, understood and all their own. Afterwards, if necessary, they make changes and resubmit. If the changes are approved, the degree is awarded.

The steps are similar in Australia , although candidates are mostly assessed on their thesis only; some universities may include taught courses, and some use a viva voce. A PhD in Australia usually takes three years full time.

In the US, the PhD process begins with taught classes (similar to a taught master’s) and a comprehensive exam (called a “field exam” or “dissertation qualifying exam”) before the candidate embarks on their original research. The whole journey takes four to six years.

A PhD candidate will need three skills and attitudes to get through their doctoral studies, says Tara Brabazon , professor of cultural studies at Flinders University in Australia who has written extensively about the PhD journey :

  • master the academic foundational skills (research, writing, ability to navigate different modalities)
  • time-management skills and the ability to focus on reading and writing
  • determined motivation to do a PhD.

Socrates' methods can still help university student in the battle with misinformation

How do I choose the topic for my PhD dissertation or thesis?

It’s important to find a topic that will sustain your interest for the years it will take to complete a PhD. “Finding a sustainable topic is the most important thing you [as a PhD student] would do,” says Dr Brabazon in a video for Times Higher Education . “Write down on a big piece of paper all the topics, all the ideas, all the questions that really interest you, and start to cross out all the ones that might just be a passing interest.” Also, she says, impose the “Who cares? Who gives a damn?” question to decide if the topic will be useful in a future academic career.

The availability of funding and scholarships is also often an important factor in this decision, says veteran PhD supervisor Richard Godwin, from Harper Adams University .

Define a gap in knowledge – and one that can be questioned, explored, researched and written about in the time available to you, says Gina Wisker, head of the Centre for Learning and Teaching at the University of Brighton. “Set some boundaries,” she advises. “Don’t try to ask everything related to your topic in every way.”

James Hartley, research professor in psychology at Keele University, says it can also be useful to think about topics that spark general interest. If you do pick something that taps into the zeitgeist, your findings are more likely to be noticed.

You also need to find someone else who is interested in it, too. For STEM candidates , this will probably be a case of joining a team of people working in a similar area where, ideally, scholarship funding is available. A centre for doctoral training (CDT) or doctoral training partnership (DTP) will advertise research projects. For those in the liberal arts and social sciences, it will be a matter of identifying a suitable supervisor .

Avoid topics that are too broad (hunger across a whole country, for example) or too narrow (hunger in a single street) to yield useful solutions of academic significance, write Mark Stephan Felix and Ian Smith. And ensure that you’re not repeating previous research or trying to solve a problem that has already been answered. A PhD thesis must be original.

What is a thesis proposal?

After you have read widely to refine your topic and ensure that it and your research methods are original, and discussed your project with a (potential) supervisor, you’re ready to write a thesis proposal , a document of 1,500 to 3,000 words that sets out the proposed direction of your research. In the UK, a research proposal is usually part of the application process for admission to a research degree. As with the final dissertation itself, format varies among disciplines, institutions and countries but will usually contain title page, aims, literature review, methodology, timetable and bibliography. Examples of research proposals are available online.

How to write an abstract for a dissertation or thesis

The abstract presents your thesis to the wider world – and as such may be its most important element , says the NUI Galway writing guide. It outlines the why, how, what and so what of the thesis . Unlike the introduction, which provides background but not research findings, the abstract summarises all sections of the dissertation in a concise, thorough, focused way and demonstrates how well the writer understands their material. Check word-length limits with your university – and stick to them. About 300 to 500 words is a rough guide ­– but it can be up to 1,000 words.

The abstract is also important for selection and indexing of your thesis, according to the University of Melbourne guide , so be sure to include searchable keywords.

It is the first thing to be read but the last element you should write. However, Pat Thomson , professor of education at the University of Nottingham , advises that it is not something to be tackled at the last minute.

How to write a stellar conclusion

As well as chapter conclusions, a thesis often has an overall conclusion to draw together the key points covered and to reflect on the unique contribution to knowledge. It can comment on future implications of the research and open up new ideas emanating from the work. It is shorter and more general than the discussion chapter , says online editing site Scribbr, and reiterates how the work answers the main question posed at the beginning of the thesis. The conclusion chapter also often discusses the limitations of the research (time, scope, word limit, access) in a constructive manner.

It can be useful to keep a collection of ideas as you go – in the online forum DoctoralWriting SIG , academic developer Claire Aitchison, of the University of South Australia , suggests using a “conclusions bank” for themes and inspirations, and using free-writing to keep this final section fresh. (Just when you feel you’ve run out of steam.) Avoid aggrandising or exaggerating the impact of your work. It should remind the reader what has been done, and why it matters.

How to format a bibliography (or where to find a reliable model)

Most universities use a preferred style of references , writes THE associate editor Ingrid Curl. Make sure you know what this is and follow it. “One of the most common errors in academic writing is to cite papers in the text that do not then appear in the bibliography. All references in your thesis need to be cross-checked with the bibliography before submission. Using a database during your research can save a great deal of time in the writing-up process.”

A bibliography contains not only works cited explicitly but also those that have informed or contributed to the research – and as such illustrates its scope; works are not limited to written publications but include sources such as film or visual art.

Examiners can start marking from the back of the script, writes Dr Brabazon. “Just as cooks are judged by their ingredients and implements, we judge doctoral students by the calibre of their sources,” she advises. She also says that candidates should be prepared to speak in an oral examination of the PhD about any texts included in their bibliography, especially if there is a disconnect between the thesis and the texts listed.

Can I use informal language in my PhD?

Don’t write like a stereotypical academic , say Kevin Haggerty, professor of sociology at the University of Alberta , and Aaron Doyle, associate professor in sociology at Carleton University , in their tongue-in-cheek guide to the PhD journey. “If you cannot write clearly and persuasively, everything about PhD study becomes harder.” Avoid jargon, exotic words, passive voice and long, convoluted sentences – and work on it consistently. “Writing is like playing guitar; it can improve only through consistent, concerted effort.”

Be deliberate and take care with your writing . “Write your first draft, leave it and then come back to it with a critical eye. Look objectively at the writing and read it closely for style and sense,” advises THE ’s Ms Curl. “Look out for common errors such as dangling modifiers, subject-verb disagreement and inconsistency. If you are too involved with the text to be able to take a step back and do this, then ask a friend or colleague to read it with a critical eye. Remember Hemingway’s advice: ‘Prose is architecture, not interior decoration.’ Clarity is key.”

How often should a PhD candidate meet with their supervisor?

Since the PhD supervisor provides a range of support and advice – including on research techniques, planning and submission – regular formal supervisions are essential, as is establishing a line of contact such as email if the candidate needs help or advice outside arranged times. The frequency varies according to university, discipline and individual scholars.

Once a week is ideal, says Dr Brabazon. She also advocates a two-hour initial meeting to establish the foundations of the candidate-supervisor relationship .

The University of Edinburgh guide to writing a thesis suggests that creating a timetable of supervisor meetings right at the beginning of the research process will allow candidates to ensure that their work stays on track throughout. The meetings are also the place to get regular feedback on draft chapters.

“A clear structure and a solid framework are vital for research,” writes Dr Godwin on THE Campus . Use your supervisor to establish this and provide a realistic view of what can be achieved. “It is vital to help students identify the true scientific merit, the practical significance of their work and its value to society.”

How to proofread your dissertation (what to look for)

Proofreading is the final step before printing and submission. Give yourself time to ensure that your work is the best it can be . Don’t leave proofreading to the last minute; ideally, break it up into a few close-reading sessions. Find a quiet place without distractions. A checklist can help ensure that all aspects are covered.

Proofing is often helped by a change of format – so it can be easier to read a printout rather than working off the screen – or by reading sections out of order. Fresh eyes are better at spotting typographical errors and inconsistencies, so leave time between writing and proofreading. Check with your university’s policies before asking another person to proofread your thesis for you.

As well as close details such as spelling and grammar, check that all sections are complete, all required elements are included , and nothing is repeated or redundant. Don’t forget to check headings and subheadings. Does the text flow from one section to another? Is the structure clear? Is the work a coherent whole with a clear line throughout?

Ensure consistency in, for example, UK v US spellings, capitalisation, format, numbers (digits or words, commas, units of measurement), contractions, italics and hyphenation. Spellchecks and online plagiarism checkers are also your friend.

Image of students being support to cross a gap in their learning

How do you manage your time to complete a PhD dissertation?

Treat your PhD like a full-time job, that is, with an eight-hour working day. Within that, you’ll need to plan your time in a way that gives a sense of progress . Setbacks and periods where it feels as if you are treading water are all but inevitable, so keeping track of small wins is important, writes A Happy PhD blogger Luis P. Prieto.

Be specific with your goals – use the SMART acronym (specific, measurable, attainable, relevant and timely).

And it’s never too soon to start writing – even if early drafts are overwritten and discarded.

“ Write little and write often . Many of us make the mistake of taking to writing as one would take to a sprint, in other words, with relatively short bursts of intense activity. Whilst this can prove productive, generally speaking it is not sustainable…In addition to sustaining your activity, writing little bits on a frequent basis ensures that you progress with your thinking. The comfort of remaining in abstract thought is common; writing forces us to concretise our thinking,” says Christian Gilliam, AHSS researcher developer at the University of Cambridge ’s Centre for Teaching and Learning.

Make time to write. “If you are more alert early in the day, find times that suit you in the morning; if you are a ‘night person’, block out some writing sessions in the evenings,” advises NUI Galway’s Dermot Burns, a lecturer in English and creative arts. Set targets, keep daily notes of experiment details that you will need in your thesis, don’t confuse writing with editing or revising – and always back up your work.

What work-life balance tips should I follow to complete my dissertation?

During your PhD programme, you may have opportunities to take part in professional development activities, such as teaching, attending academic conferences and publishing your work. Your research may include residencies, field trips or archive visits. This will require time-management skills as well as prioritising where you devote your energy and factoring in rest and relaxation. Organise your routine to suit your needs , and plan for steady and regular progress.

How to deal with setbacks while writing a thesis or dissertation

Have a contingency plan for delays or roadblocks such as unexpected results.

Accept that writing is messy, first drafts are imperfect, and writer’s block is inevitable, says Dr Burns. His tips for breaking it include relaxation to free your mind from clutter, writing a plan and drawing a mind map of key points for clarity. He also advises feedback, reflection and revision: “Progressing from a rough version of your thoughts to a superior and workable text takes time, effort, different perspectives and some expertise.”

“Academia can be a relentlessly brutal merry-go-round of rejection, rebuttal and failure,” writes Lorraine Hope , professor of applied cognitive psychology at the University of Portsmouth, on THE Campus. Resilience is important. Ensure that you and your supervisor have a relationship that supports open, frank, judgement-free communication.

If you found this interesting and want advice and insight from academics and university staff delivered direct to your inbox each week, sign up for the THE Campus newsletter .

Authoring a PhD Thesis: How to Plan, Draft, Write and Finish a Doctoral Dissertation (2003), by Patrick Dunleavy

Writing Your Dissertation in Fifteen Minutes a Day: A Guide to Starting, Revising, and Finishing Your Doctoral Thesis (1998), by Joan Balker

Challenges in Writing Your Dissertation: Coping with the Emotional, Interpersonal, and Spiritual Struggles (2015), by Noelle Sterne

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how long is an phd

  • How Long Is a PhD Thesis?
  • Doing a PhD

It’s no secret that one of the most challenging aspects of a PhD degree is the volume of work that goes into writing your thesis . So this raises the question, exactly how long is a thesis?

Unfortunately, there’s no one size fits all answer to this question. However, from the analysis of over 100 PhD theses, the average thesis length is between 80,000 and 100,000 words. A further analysis of 1000 PhD thesis shows the average number of pages to be 204 . In reality, the actual word count for each PhD thesis will depend on the specific subject and the university it is being hosted by. This is because universities set their own word length requirements, with most found to be opting for around 100,000.

To find out more about how these word limits differ between universities, how the average word count from STEM thesis differ from non-STEM thesis and a more detailed breakdown from the analysis of over 1000 PhDs, carry on reading the below.

Word Count Differences Between Universities

For any PhD student writing a thesis, they will find that their document will be subject to a word limit set by their university. In nearly all cases, the limit only concerns the maximum number of words and doesn’t place any restrictions on the minimum word limit. The reason for this is that the student will be expected to write their thesis with the aim of clearly explaining their research, and so it is up to the student to determine what he deems appropriate.

Saying this, it is well accepted amongst PhD students and supervisors that the absence of a lower limit doesn’t suggest that a thesis can be ‘light’. Your thesis will focus on several years worth of original research and explore new ideas, theories or concepts. Besides this, your thesis will need to cover a wide range of topics such as your literature review, research methodology, results and conclusion. Therefore, your examiners will expect the length of your thesis to be proportional to convey all this information to a sufficient level.

Selecting a handful of universities at random, they state the following thesis word limits on their website:

  • University of Edinburgh: 100,000
  • University of Exeter: 100,000
  • University of Leister: 80,000
  • University of Bath: 80,000
  • University of Warwick: 70,000

The above universities set upper word limits that apply across the board, however, some universities, such as the University of Birmingham and the University of Sheffield, set different word limits for different departments. For example, the University of Sheffield adopts these limits:

  • Arts & Humanities: 75,000
  • Medicine, Dentistry & Health: 75,000
  • Science: 80,000
  • Social Sciences: 75,000-100,000

Although there’s a range of limit, it’s safe to say that the majority fall within the 80,000 to 100,000 bracket.

Word Count Based on Data from past Theses

A poll of 149 postdocs.

In mid-2019, Dr Eva Lantsoght, a published author, academic blogger and Structural Engineering Professor, conducted a poll which asked postgraduate doctoral students to share the length of their final thesis. 149 PostDoc students responded to the survey, with the majority reporting a length falling within the ‘80,000 – 120,000 words’ bracket as seen below.

DiscoverPhDs_How-long-is-a-PhD-Thesis_Poll

Analysis of 1000 PhD Theses

Over a three-year time period, Dr Ian Brailsford, a then Postgraduate Learning Adviser at the University of Auckland, analysed 1000 doctoral thesis submitted to his university’s library. The PhD theses which formed the basis of his analysis were produced between 2008 to 2017 and showed:

  • Average number of pages = 204
  • Median number of pages = 198
  • Average number of chapters = 7.6

We should note that the above metrics only cover the content falling within the main body of the thesis. This includes the introduction, literature review, methods section, results chapter, discussions and conclusions. All other sections, such as the title page, abstract, table of contents, acknowledgements, bibliography and appendices were omitted from the count.

Although it’s impossible to draw the exact word count from the number of pages alone, by using the universities recommended format of 12pt Times New Roman and 1.5 lines spacing, and assuming 10% of the main body are figures and footnotes, this equates to an average main body of 52,000 words.

STEM vs Non-STEM

As part of Dr Ian Brailsford’s analysis, he also compared the length of STEM doctorate theses to non-STEM theses. He found that STEM theses tended to be shorter. In fact, he found STEM theses to have a medium page length of 159 whilst non-STEM theses had a medium of around 223 pages. This is a 40% increase in average length!

Can You Exceed the Word Count?

Whilst most universities will allow you to go over the word count if you need to, it comes with the caveat that you must have a very strong reason for needing to do so. Besides this, your supervisor will also need to support your request. This is to acknowledge that they have reviewed your situation and agree that exceeding the word limit will be absolutely necessary to avoid detriment unnecessary detriment to your work.

This means that whilst it is possible to submit a thesis over 100,000 words or more, it’s unlikely that your research project will need to.

How Does This Compare to a Masters Dissertation?

The average Masters dissertation length is approximately 20,000 words whilst a thesis is 4 to 5 times this length at approximately 80,000 – 100,000.

The key reason for this difference is because of the level of knowledge they convey. A Master’s dissertation focuses on concluding from existing knowledge whilst a PhD thesis focuses on drawing a conclusion from new knowledge. As a result, the thesis is significantly longer as the new knowledge needs to be well documented so it can be verified, disseminated and used to shape future research.

Finding a PhD has never been this easy – search for a PhD by keyword, location or academic area of interest.

Related Reading

Unfortunately, the completion of your thesis doesn’t mark the end of your degree just yet. Once you submit your thesis, it’s time to start preparing for your viva – the all-to-fun thesis defence interview! To help you prepare for this, we’ve produced a helpful guide which you can read here: The Complete Guide to PhD Vivas.

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Is a Doctorate Degree Worth It?

A blue graphic with an outline of a student wearing a grad cap next to a student using her laptop researching if a doctorate degree is worth it

Know before you read At SNHU, we want to make sure you have the information you need to make decisions about your education and your future—no matter where you choose to go to school. That's why our informational articles may reference careers for which we do not offer academic programs, along with salary data for those careers. Cited projections do not guarantee actual salary or job growth.

Earning a doctorate takes time, money and discipline. Like many things worth doing, the process is challenging but also rewarding. Becoming an expert in your subject area and immersing yourself in your chosen area of study makes the process of earning a doctorate important to many people. Certain professions require or value a doctorate for promotion potential.

In fact, career advancement, love of the subject matter and personal satisfaction are three of the top reasons why Dr. Bridgitte Kiprop '23 , Dr. Jennifer Barry ’23 and Dr. Torialyn Draper Crook earned their doctorates.

  • For Kiprop '23, part of her motivation for earning a doctorate in International Business was setting an example for her six children.
  • For Barry, ’23, who earned a doctor of education degree in educational leadership, part of her motivation was to prepare for success in meeting her long-term career goal to become a university president.
  • And for Crook, earning her doctorate in education was a commitment that she undertook to honor her family’s legacy of valuing education.

How Difficult is Earning a Doctorate?

Dr Jennifer Barry, a doctor of education degree in educational leadership graduate from SNHU

For Kiprop, time management was her key to success. With six children, she had to make the most of any time in the day that she could find. “If I had … five minutes, I would use the five minutes,” she said. “Other times, I was luckier (and had) two hours.”

Despite the time-management  challenges of earning an advanced degree while raising her family, Kiprop feels that the process of earning that degree was a way to inspire her children to work hard to meet their own goals.

“I really hope that my children will ... know that whatever it is they feel called to do, whatever their ambitions, their goals are achievable,” she said.

To manage the challenge of advanced studies, having the right people around you as you work on your degree is essential, according to Crook. “Surround yourself with family, friends, colleagues and mentors who can provide encouragement during challenging times,” she said.

Crook stresses that everyone’s journey to earning their doctorate is unique. She recommends being prepared for the unexpected, and remaining flexible in adjusting your path as you work toward completing your degree.

How Long Does a Doctorate Take?

A clock on an blue background

Students may have family commitments, health challenges or need to work full or part-time while attending school . Many students face all of these circumstances. Crook managed to complete her doctorate in 5 years, though it wasn't easy for her. She faced a significant personal health challenge and was raising two children while also attending school.

For Barry, earning her doctoral degree is part of an educational path that started with her bachelor’s degree at SNHU (formerly New Hampshire College) in 2000. She then continued her education to earn a master's degree throughout several jobs and geographic moves.

Barry views her entire educational journey as part of the process that led to meeting her ultimate goal of earning a doctorate.

What Skills Are Needed to Earn a Doctorate?

Dr Torialyn Draper Crook, a career advisor at SNHU

While every academic program is different, Crook finds certain skills and competencies necessary for success, regardless of field. These skills include:

  • Building relationships
  • Organizational skills
  • Self-motivation
  • Writing skills

Crook finds building relationships particularly important. While working on her degree, the strong relationship that she developed with her dissertation chairperson proved essential. She also built positive relationships with other doctoral students, which led to a strong peer support network throughout her program.

Kiprop echoes the importance of building relationships in her field as well. For her, building new relationships is a way to open your mind to new experiences and opportunities.

Find Your Program

What types of jobs can you get with a doctorate.

While a doctorate is helpful for working in leadership roles at colleges and universities, there are many opportunities for doctoral degree holders to work at the highest levels in their profession outside of higher education as well.

Some of the top professions that require a doctoral or professional degree and have a faster-than-average predicted growth rate, according to the BLS, are:

  • Astronomers* (SNHU does not currently offer graduate degrees in astronomy or physics)
  • Biochemists and biophysicists* (SNHU does not currently offer graduate degrees in biochemistry or biophysics)
  • Clinical and counseling psychologists* (SNHU does not currently offer doctorates in psychology, but you could start with a bachelor's in psychology , followed by a master's in psychology )
  • Higher education teachers and professors — particularly business, computer science and engineering teachers*

A graphic with a blue background and a white briefcase icon

Two more examples of areas where a doctorate can help prepare you for advancement in your career are educational leadership and international business.

A doctorate in educational leadership can be a Doctor of Philosophy degree, known as a PhD, or a Doctor of Education degree, known as an EdD. The PhD in Education Leadership  typically leads to higher education roles in teaching and research. The EdD in Educational Leadership , which Barry earned, typically leads to leadership and strategy roles in an education setting that may be at the higher education or secondary school level.

Dr Bridgitte Kiprop, a doctorate in International Business graduate from SNHU

A PhD in International Business  may include addressing a gap in an existing body of knowledge by conducting research. Kiprop, who earned her doctorate at SNHU, plans to use her degree to research entrepreneurship in small business finance.

Motivated by being from a developing country — Kenya — she has a personal interest in helping grow small businesses in similar developing areas. “I can also use that same knowledge at the New Hampshire level because the issues there perhaps are different but still … relevant,” she said.

Regardless of your program field, the process of earning a doctorate can help you explore ways of applying your newfound and existing knowledge that you may not have considered prior to starting your program.

Is it Better to Have a Master’s or Doctorate?

Both a master’s degree  and a doctorate offer opportunities for career advancement. Choosing which to earn, or whether to earn both, is a highly personal decision based on your personal and professional goals and aspirations, according to Crook.

Before deciding which degree is right for you, consider your goals. Speaking with a career counselor  or graduate admissions counselor to learn about career options and pathways toward earning the degree can be a helpful step toward making this decision.

In many fields, a master’s degree is enough  to move forward in your career. But, earning a doctorate is an opportunity to take your career a step further, according to Crook. That step “gives one the opportunity to direct their career trajectory specifically through research and other specialized skills and knowledge,” she said.

How Valuable is a Doctorate?

A doctorate isn’t for everyone, but it can be right for you depending on your chosen field and career path.

For many people, earning a doctorate is just as important as a personal accomplishment as it is a professional one. “I (always) understood the significance of progressing in my career and staying connected to my field of higher education,” Crook said. “My doctoral journey was worthwhile as it aligned with my career goals  and personal aspirations,” she said.

For Barry, the doctorate was worth it because she believes strongly in the power of education . “You see how (education) transforms people’s lives and … gives people opportunities that they didn’t see before,” she said.

She has seen many people earn degrees only for their family members to then continue in their footsteps. “I just think that generationally, (education) is creating pathways for people,” she said.

Deciding whether to pursue a doctorate is ultimately a very personal decision, but one that can lead you to build new relationships and a new knowledge base while helping you reach or exceed your career goals.

A degree can change your life. Find the SNHU doctorate degree  that can best help you meet your goals.

*Cited job growth projections may not reflect local and/or short-term economic or job conditions and do not guarantee actual job growth. Actual salaries and/or earning potential may be the result of a combination of factors including, but not limited to: years of experience, industry of employment, geographic location, and worker skill. 

A former higher education administrator, Dr. Marie Morganelli  is a career educator and writer. She has taught and tutored composition, literature, and writing at all levels from middle school through graduate school. With two graduate degrees in English language and literature, her focus — whether teaching or writing — is in helping to raise the voices of others through the power of storytelling. Connect with her on LinkedIn .

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Founded in 1932, and online since 1995, we’ve helped countless students reach their goals with flexible, career-focused programs . Our 300-acre campus in Manchester, NH is home to over 3,000 students, and we serve over 135,000 students online. Visit our about SNHU  page to learn more about our mission, accreditations, leadership team, national recognitions and awards.

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How can we make PhD training fit for the modern world? Broaden its philosophical foundations

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You have highlighted how PhD training assessment has stagnated, despite evolving educational methodologies (see Nature 613 , 414 (2023) and Nature 627 , 244; 2024 ). In particular, you note the mismatch between the current PhD journey and the multifaceted demands of modern research and societal challenges.

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Long Duy Duong, PhD

  • Assistant Professor, Research

Areas of Interest

Publications.

Dr. Duong received his master’s degree in Genetics in 2012 from University of Science, Vietnam National University, Vietnam. He attended the PhD program in Biomedical Sciences of Tsukuba University, Japan in 2014 and carried out the research on the role of cytoplasmic deadenylases and poly(A) tail in translation regulation and was awarded PhD degree in 2018. He then moved to the United States and started working at the Department of Microbiology and Molecular Genetics, McGovern Medical School, The University of Texas Health Science Center at Houston as a postdoctoral researcher focusing on the role of G4 DNA structure in transcription control using budding yeast as a model organism. In Feb 2024, he was promoted to Research Assistant Professor and is currently working on the role of small heat shock proteins in cellular redox imbalance and proteostasis.

Research Interests

– Determine the nature and physiology of chronic sequestrase/misfolded protein assemblies in redox-imbalance cells.

– Assess the physiological overlap between chronological aging and redox imbalance.

– Regulation of unfolded protein response (UPR) pathway under redox stress.

Visit the PubMed profile page

Goncalves D, Duy DL , Peffer S, Morano KA. Cytoplasmic redox imbalance in the thioredoxin system activates Hsf1 and results in hyperaccumulation of the sequestrase Hsp42 with misfolded proteins.  Mol Biol Cell . 2024;35(4):ar53. doi:10.1091/mbc.E23-07-0296

Duy DL , Kim N. Yeast transcription factor Msn2 binds to G4 DNA.  Nucleic Acids Res . 2023;51(18):9643-9657. doi:10.1093/nar/gkad684

Fujii S, Duy DL , Valderrama AL, et al. Pan2-Pan3 complex, together with Ccr4-Not complex, has a role in the cell growth on non-fermentable carbon sources.  Biochem Biophys Res Commun . 2021;570:125-130. doi:10.1016/j.bbrc.2021.07.007

Valderrama AL, Fujii S, Duy DL , et al. Pbp1 mediates the aberrant expression of genes involved in growth defect of ccr4∆ and pop2∆ mutants in yeast Saccharomyces cerevisiae.  Genes Cells . 2021;26(6):381-398. doi:10.1111/gtc.12846

Viet NTM, Duy DL , Saito K, et al. Regulation of LRG1 expression by RNA-binding protein Puf5 in the budding yeast cell wall integrity pathway.  Genes Cells . 2018;23(12):988-997. doi:10.1111/gtc.12646

Duy DL , Suda Y, Irie K. Cytoplasmic deadenylase Ccr4 is required for translational repression of LRG1 mRNA in the stationary phase.  PLoS One . 2017;12(2):e0172476. Published 2017 Feb 23. doi:10.1371/journal.pone.0172476

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Pregnancy Accelerates Biological Aging in a Healthy, Young Adult Population

Each additional pregnancy during early adulthood was associated an estimated 2.4 and 2.8 months of accelerated biological aging.

Pregnancy may carry a cost, reports a new study from the Columbia University Mailman School of Public Health . The research, carried out among 1735 young people in the Philippines, shows that women who reported having been pregnant looked biologically older than women who had never been pregnant, and women who had been pregnant more often looked biologically older than those who reported fewer pregnancies. Notably, the number of pregnancies fathered was not associated with biological aging among same-aged cohort men, which implies that it is something about pregnancy or breastfeeding specifically that accelerates biological aging. The findings are published in the  Proceedings of National Academy of Sciences .

This study builds on epidemiological findings that high fertility can have negative side effects on women’s health and longevity. What was unknown, however, was whether the costs of reproduction were present earlier in life, before disease and age-related decline start to become apparent. Until now, one of the challenges has been quantifying biological aging among the young. This challenge was overcome by using a collection of new tools that use DNA methylation (DNAm) to study different facets of cellular aging, health, and mortality risk. These tools, called ‘epigenetic clocks’ allow researchers to study aging earlier in life, filling a key gap in the study of biological aging.

“Epigenetic clocks have revolutionized how we study biological aging across the lifecourse and open up new opportunities to study how and when long-term health costs of reproduction and other life events take hold”, said Calen Ryan, PhD, associate research scientist in the Columbia Aging Center , and lead author.

“Our findings suggest that pregnancy speeds up biological aging, and that these effects are apparent in young, high-fertility women,” said Ryan. “Our results are also the first to follow the same women through time, linking changes in each woman’s pregnancy number to changes in her biological age.”

The relationship between pregnancy history and biological age persisted even after taking into account various other factors tied to biological aging, such as socioeconomic status, smoking, and genetic variation, but were not present among men from the same sample. This finding, noted Ryan, points to some aspect of bearing children—rather than sociocultural factors associated with early fertility or sexual activity—as a driver of biological aging.

Despite the striking nature of the findings, Ryan encourages readers to remember the context: “Many of the reported pregnancies in our baseline measure occurred during late adolescence, when women are still growing. We expect this kind of pregnancy to be particularly challenging for a growing mother, especially if her access to healthcare, resources, or other forms of support is limited.”

Ryan also acknowledged that there is more work to do, “We still have a lot to learn about the role of pregnancy and other aspects of reproduction in the aging process. We also do not know the extent to which accelerated epigenetic aging in these particular individuals will manifest as poor health or mortality decades later in life.”

Ryan said that our current understanding of epigenetic clocks and how they predict health and mortality comes largely from North America and Europe, but that the aging process can take slightly different forms in the Philippines and other places around the world.

“Ultimately I think our findings highlight the potential long-term impacts of pregnancy on women’s health, and the importance of taking care of new parents, especially young mothers.”

Co-authors are Christopher Kuzawa, Northwestern University, Nanette R. Lee and Delia B. Carba, USC-Office of Population Studies Foundation; Julie L. MacIsaac, David S. Lin, and Parmida Atashzay, University of British Columbia; Daniel Belsky Columbia Public Health and Columbia Aging Center; Michael S. Kobor, University of British Columbia, Canadian Institute for Advanced Research, Centre for Molecular Medicine and Therapeutics.

The study was supported by the National Institutes of Health R01AG061006; National Science Foundation BCS 1751912; University of British Columbia UBC 60055724.

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Stephanie Berger, [email protected]

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  1. Doctor of Philosophy

    A Doctor of Philosophy (PhD, Ph.D., or DPhil; Latin: philosophiae doctor or doctor philosophiae) is the most common degree at the highest academic level, awarded following a course of study and research. The degree is abbreviated PhD and sometimes, especially in the U.S., as Ph.D. It is derived from the Latin Philosophiae Doctor, pronounced as three separate letters (/ p iː eɪ tʃ ˈ d iː ...

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    Written by Coursera Staff • Updated on Jan 31, 2024. A PhD program typically takes four to seven years, but a variety of factors can impact that timeline. A PhD, or doctorate degree, is the highest degree you can earn in certain disciplines, such as psychology, engineering, education, and mathematics. As a result, it often takes longer to ...

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  5. How Long Does it Take to Get a PhD? A Go-Getter's Guide

    On average, it takes 4-5 years to complete a Doctor of Philosophy (PhD) program. In the US, most PhD programs are between 4-6 years, while in Canada they are typically shorter, around 3-4 years. Some students take longer than 6 years to complete their PhD, but in general the longest time it takes to get a PhD is capped at 8 years.

  6. PhD Duration: How Long Will Your Doctorate Take?

    3 to 4 years. In the USA, a PhD takes four to six years. There are several reasons for this. While in the UK, you tend to apply for a specific project, in the US, your application is aimed at a certain department and your actual proposal takes shape in the first couple of years of PhD study. The US model involves a two-phase programme, wherein ...

  7. How Long Does It Take to Get a PhD?

    For a traditional, campus-based PhD program, the average time to finish a PhD is 8 years. Fulfilling the program's requirements will often demand a serious investment of your time. Even still, some people are able to finish their programs in just 3 to 6 years. Multiple factors may influence the overall length of your program.

  8. How long does it take to get a PhD?

    In the United States, PhDs usually take between 5-7 years: 2 years of coursework followed by 3-5 years of independent research work to produce a dissertation. In the rest of the world, students normally have a master's degree before beginning the PhD, so they proceed directly to the research stage and complete a PhD in 3-5 years.

  9. How Long Does A PhD Take?

    In the UK, a part-time PhD will typically take you 6 to 7 years; twice as long as doing a full-time PhD. The reason for this is that as a part-time PhD student, you would dedicate around 20 hours per week to your PhD as opposed to the typical 40 hours full-time students would put into their subject.

  10. What Does 'PhD' Stand For?

    A PhD is a terminal academic degree students typically pursue when they're interested in an academic or research career. A PhD is the highest possible academic degree a student can obtain. PhD stands for "Doctor of Philosophy," which refers to the immense knowledge a student gains when earning the degree. While you can actually get a PhD in ...

  11. Master's vs PhD

    A PhD, or doctoral degree, takes 3-7 years to complete (depending on the country) and prepares you for a career in academic research. ... Mostly coursework, often with a semester-long thesis or capstone project at the end. 2 years of coursework (in the US), followed by 3-5 years of preparing a dissertation, which should make a significant ...

  12. How Long Does It Take to Earn a Doctoral Degree?

    Choose the Doctoral Degree That's Right for You. The number of years you spend on your doctorate depends partly on your intended course of study. Many PhD programs are designed to take just three to five years. And PhD programs are not the only road to a doctoral degree. You could also choose to earn a professional doctorate.

  13. How Long Does It Take to Earn a PhD?

    Earning a PhD usually takes between four and seven years to complete, depending on the type of PhD as well as the schools requirements, the students educational background, and personal progress. Students who take full-time classes can typically finish in four years. A typical PhD program requires anywhere from 60 to 120 semester credit hours .

  14. PhD Admission FAQ

    How long does it take to get a PhD in Psychology at Stanford? The PhD program is designed to be completed in five years of full-time study. Actual time will depend on students' prior background, progress, and research requirements. The minimum residency requirement for the PhD degree is 135 units of completed coursework and research units.

  15. How Long Does a PhD Take?

    What is the Average Time it Takes to Get a PhD? 5.8 years—that's the average amount of time a student spends on their PhD program, according to a US News report on the Survey of Earned Doctorates in 2017. The specific field of study, however, may tilt this average higher or lower.

  16. What is a PhD?

    How long is a PhD in the UK? Full-time PhDs usually last for three or four years, while part-time PhDs can take up to six or seven. However, the thesis deadline can be extended by up to four years at the institution's discretion. ... Integrated/New Route PhD - This four-year PhD course is offered by over 30 universities and involves taking a ...

  17. How Long Does It Take to Get a PhD in Psychology?

    The answer can vary depending on your program, educational background, and academic schedule. In general, most PhD psychology programs take anywhere from five to seven years to complete. Learning more about what it takes to get a doctorate in psychology can help you better plan your educational and career journey.

  18. Frequently Asked Questions for PhD Applicants

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    Long Duy Duong, PhD. Assistant Professor, Research Contact Long Duy Duong, PhD 713-500-5894. Biography; Areas of Interest; ... He attended the PhD program in Biomedical Sciences of Tsukuba University, Japan in 2014 and carried out the research on the role of cytoplasmic deadenylases and poly(A) tail in translation regulation and was awarded PhD ...

  30. Pregnancy Accelerates Biological Aging in a Healthy, Young Adult

    "Epigenetic clocks have revolutionized how we study biological aging across the lifecourse and open up new opportunities to study how and when long-term health costs of reproduction and other life events take hold", said Calen Ryan, PhD, associate research scientist in the Columbia Aging Center, and lead author.