How long is a dissertation? Word limits by degree, field and country

How long a dissertation is depends on the degree and on your university's rules, which set a maximum rather than a target. In the published limits below, a PhD thesis is capped at 80,000 words (University of Manchester) or 100,000 (University of Edinburgh, and Oxford's DPhil in History), a research master's thesis at 30,000 to 60,000 words, and a taught master's or final-year undergraduate dissertation at 10,000 to 15,000. In the US, graduate schools such as UNC Chapel Hill's check format rather than length, so the department decides and counts in pages: most University of Minnesota dissertations ran 100 to 200.

Check your department's current dissertation handbook before you set a word target. A limit for the main text can leave out the bibliography and appendices, and the handbook, not a list like this one, decides. The figures below are limits from named universities' rules, as of November 2026, except the Minnesota page counts, which describe dissertations people actually submitted. After the numbers come the details that change them: what counts toward a limit, how words convert to pages, and how to split the total between chapters. For the writing itself, see how to write a dissertation.

Dissertation length at a glance

Your department's current handbook controls. Every number in the table except the Minnesota count is a limit one university sets for one degree, usually a ceiling, and the rules change from year to year. The Minnesota figure is what people submitted, not a rule anyone set.

How long is a PhD dissertation?

For a doctorate, the number usually sits in the university's regulations, and it is a maximum. Manchester's Presentation of Theses Policy says that theses for the PhD, EngD and MD “must not normally exceed 80,000 words of main text”, footnotes and endnotes included. Main text means the core chapters that present the argument and findings. A longer thesis needs prior permission from the faculty's Doctoral Academy, and the final word count has to be printed at the bottom of the contents page.

Edinburgh sets the ceiling higher, at 100,000 words, and its College can allow more only in exceptional circumstances, on the supervisor's recommendation, when the topic needs it. The same regulation adds a line worth pinning above your desk: “There is no minimum word count.” At Oxford, the DPhil in History asks for a thesis of not more than 100,000 words, defended in an oral examination before two examiners.

Master's and undergraduate dissertations

For taught degrees, look for the number in your course or program handbook, not in the university's regulations. Edinburgh's postgraduate degree regulations set word limits for research degrees but not for taught master's dissertations. The figure is in the course description instead: the taught MSc in History ends in a 15,000-word dissertation worth 60 credits (30 ECTS), after a 2,000-word proposal graded pass or fail. Oxford's MSc in Sociology asks for “a dissertation of up to 10,000 words” at the end of the year.

Research master's degrees are back in the regulations, with larger numbers. Edinburgh caps the MSc by Research at 30,000 words and the MPhil at 60,000. Manchester caps the MPhil at 50,000 words of main text, the same as its professional doctorates.

Undergraduate dissertations are shorter again. At Edinburgh, the fourth-year English Literature dissertation is a single 10,000-word essay worth 40 credits, and it carries the whole mark for the course. Other departments and universities set their own figures, so the course page or handbook is the place to check.

Length by field and format

Within one university, length still varies with the field. In a 2013 blog post, Marcus Beck counted 2,536 University of Minnesota dissertations completed since 2007 and found that most ran about 100 to 200 pages. The lowest median lengths were in economics, mathematics and biostatistics, and the highest in anthropology, history and political science. His counts came from the page totals in the university's digital repository, and he notes that one-sided, double-spaced pages and whatever authors put in appendices inflate them: the written portion may be less than half the page count.

One likely reason is the evidence: a proof or a model can take fewer pages than an argument built from archives, interviews and fieldwork. The format of the doctorate changes the number too:

• Thesis by publication. Manchester's journal-format doctoral thesis can run to 90,000 words of main text, or 60,000 for an MPhil or professional doctorate. Edinburgh allows a PhD by research publications 100,000 words in total, and the critical review that frames the papers must be between 10,000 and 25,000 of them.
• Practice-based and creative doctorates. For a practice-based PhD, Manchester asks for a thesis of between 20,000 and 50,000 words. Edinburgh's PhD in Creative Writing pairs up to 75,000 words of prose (or 75 pages of verse, or a dramatic composition of up to three hours) with a critical essay of up to 25,000 words, and its PhD in Architecture by Design caps the thesis at 50,000.
• Professional doctorates. Manchester caps them at 50,000 words. At Edinburgh, the clinical psychology doctorate allows 30,000 and the psychotherapy and counselling doctorate sets a range of 35,000 to 55,000.

Dissertation length by country

The word itself changes meaning: a PhD produces a thesis in the UK and a dissertation in the US, while a UK dissertation is the shorter project that ends a bachelor's or taught master's degree. Check which one you are writing before you compare numbers.

• United Kingdom. Limits are written in words. Research degrees have them in the university regulations, taught degrees in course documents, as in the examples above.
• United States. The graduate school's thesis guide is mostly about format. UNC Chapel Hill's Graduate School says it “will check your thesis or dissertation for proper formatting only”. Expectations come from your department and committee, and they are discussed in pages. To learn yours, open five recent dissertations from your department in the library's repository and note their length.
• Canada. The University of British Columbia's rules for the structure of theses limit the abstract to 350 words and the lay summary to 150 but say nothing about the length of the thesis itself, so the program decides.

What counts toward the word limit

Two theses of the same size can report different word counts, because universities count different parts. Manchester and Edinburgh show how far apart the rules can be:

So at Edinburgh, long acknowledgements come out of your 100,000 words, while the abstract is free at both universities. Manchester adds two details people miss: when you quote another language alongside an English translation, only the translation counts, and the final count, footnotes included, goes at the bottom of the contents page. If your regulations don't say whether something counts, ask the graduate school before you cut, and keep the answer in writing.

Here is how the two rules treat one draft. The figures are invented; the rules are each university's.

The word processor's total, almost 110,000, is the wrong number at both universities. At Manchester the draft needs 2,000 words cut from the chapters or footnotes, or the Doctoral Academy's permission to run long; at Edinburgh it is well inside the limit even with the front matter counted.

How many pages is a dissertation?

A page count depends on the template more than the text: font, spacing, margins, headings and figures all change it. To convert words to pages, use your own numbers rather than a rule of thumb:

1. Set up the required format

   Open your university's thesis template, or set the font, size, line spacing and margins its format guide requires.

2. Measure your words per page

   Paste in three to five pages of your own prose with no headings, figures or tables, and divide the word count by the number of pages.

3. Convert, then add the rest

   Divide the word limit by that figure for the text pages. Then add the front matter, figures, tables, references and appendices to get the length of the whole document.

For example, if your template holds 275 words a page, an 80,000-word thesis is about 290 pages of text and a 15,000-word dissertation about 55, before references and appendices. Going the other way, a committee's “about 150 pages” is roughly 41,000 words at the same density, and less if the 150 pages include the bibliography.

A word budget for each chapter

For a conventional thesis, none of the regulations above says how to divide the words, and the right split depends on your question. Many empirical dissertations follow an expanded IMRaD structure, and for planning one, shares like these are a reasonable place to start:

Adjust from there with your supervisor. A study with a new method may need a longer methodology chapter, and a theoretical dissertation may fold results and discussion into one long argument. A humanities dissertation organized by argument has a different shape: an introduction of about a tenth, three to five chapters of similar length, and a short conclusion. In a thesis by publication the frame is set for you. At Edinburgh, the critical review takes 10,000 to 25,000 of the 100,000 words, and the papers fill the rest.

Write the targets into your plan before you draft. The dissertation outline template has a chapter plan with targets and dates, and the thesis outline template has page targets for each chapter of a master's thesis.

If you're over or under

If the draft runs long, cut in this order:

1. Repetition: chapter summaries that restate the introduction, and method details repeated in the results.
2. Literature that doesn't serve the question. The review sets up your gap; it doesn't list all you read.
3. Appendix material: instruments, extra tables and long transcripts, since neither Manchester nor Edinburgh counts appendices. Keep the argument in the chapters.
4. Then ask about permission, early, if the topic truly needs more. Both universities above require it.

If you draft in Strokes, version history keeps earlier versions on your device, so a section you cut to fit the limit can be previewed and restored if your supervisor wants it back.

A short dissertation is not a problem in itself. Where a minimum exists, the rules say so, like the 35,000-word floor on Edinburgh's psychotherapy doctorate. Otherwise, ask your supervisor whether every sub-question has an answer.