Dissertation vs Thesis vs Capstone

The words dissertation and thesis swap meaning depending on where you study, and the confusion matters more than it seems. The label hints at how much originality your examiners expect, so reading it the wrong way can set up your whole project on the wrong footing.

Having coached 10,000+ students, we’ve found it’s one of the first questions people ask. In this post, I’ll explain how the terms differ by country and by level of study, where a capstone project fits, and how to check what your own university means.

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Dissertation vs thesis: showdown time

Before comparing the two, it helps to see what they have in common. Dissertations and theses are both formal academic research projects. In each, you ask a well-defined research question, review what other researchers have found, collect and analyze data using a justified methodology, and draw conclusions from your analysis. If you’d like the full picture of that process, our guide to what a dissertation is walks through it step by step.

So in substance, they’re the same kind of project. The differences lie in what they’re called where you study, and in how much originality is expected at your level.

So, which is which?

This is where it gets confusing, because the two terms swap meaning between countries. Here’s how the US and UK systems usually use them:

Level of study	United States	United Kingdom
Undergraduate	Thesis (often an honors thesis, if any)	Dissertation
Master’s	Thesis	Dissertation (taught master’s)
Doctoral	Dissertation	Thesis

In the US, the University of North Carolina’s Graduate School, for example, refers to master’s thesis and doctoral dissertation requirements. In the UK, the University of Essex puts it plainly: “dissertation tends to be the preferred term at undergraduate and taught postgraduate level, and thesis used for original research at doctoral (Ph.D.) level.”

Australia keeps it simpler: the project is usually called a thesis at every research level, from honors to the PhD. The Australian National University’s honors and advanced master’s students submit a thesis, for example, and Victoria University’s research master’s and PhD candidates submit one too.

Canada is mixed: McGill, for example, calls doctoral work a PhD thesis, so check your own university’s wording.

Terminology can even vary between universities in the same country. So read your program’s handbook, and look at past projects in your university’s library or repository, or in our collection of master’s and doctoral examples. Some programs also require an oral exam at the end, called a defense in the US and a viva voce (or viva) in the UK, especially at doctoral level.

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What about a capstone project?

A capstone is the third term in the mix, and it’s genuinely different, not just another name for a thesis. It’s a culminating project, common in professional and practice-based programs (for example, nursing, public health, nutrition and software engineering), that applies what you’ve learned to a practical problem.

Oregon Health & Science University’s nutrition master’s program draws the line clearly. Its guide says practice-based programs use a capstone “to emphasize preparation of the student for professional practice. In contrast, a thesis is an academic-focused research project with broader applicability.” A thesis, it adds, should answer a question that “contributes to new knowledge in the field” and “is applicable beyond the single setting”, while a capstone answers “a question of practical importance” within a particular organization.

The Rochester Institute of Technology’s software engineering master’s puts the originality point bluntly: in a capstone, “Original insight into a problem is desirable but not required.”

Here’s how the two usually compare:

	Dissertation or thesis	Capstone project
Main aim	Answer a research question and add to knowledge in the field	Solve a practical problem or show readiness for professional practice
Original research	Expected, and more so at doctoral level	Often welcome but not required
Typical setting	Research-focused programs	Professional and practice-based programs
Typical output	A multi-chapter research document	A report, tool, program or product, plus a write-up
Reach of the findings	Meant to apply beyond one setting	Often focused on one organization or setting

If your program offers a choice, I’d start by asking what you want the project to do for you. A thesis builds the research skills you’d need for a doctorate or a research career; a capstone builds evidence that you can solve real problems in your field.

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How the level of study changes the project

Whatever it’s called, the bigger difference between projects is the level of study, because each level asks for more originality than the last.

• Undergraduate projects usually show that you can find, organize and apply existing knowledge. You’re not expected to discover something new, but to bring existing research together clearly and from a fresh angle.
• Master’s projects usually ask for some original insight, and how much varies. A research master’s thesis typically expects a genuine contribution, while a taught master’s dissertation may focus more on applying a method well.
• Doctoral projects must make a significant original contribution to knowledge. That’s why the doctoral version, whatever your country calls it, is the longest and most demanding of the three.

The safest check is your program’s guidelines and a conversation with your supervisor about what “original” means in your context.

Still have questions?

Is a dissertation harder than a thesis?

It depends on the level, not the name. In the US, a doctoral dissertation is a much bigger undertaking than a master’s thesis. In the UK, it’s the PhD thesis that’s the bigger project. Compare the level of study and your program’s requirements rather than the label.

Is a PhD just a dissertation?

Not usually. In the US, most PhD programs combine coursework and qualifying exams with the dissertation, which is the largest single component. In the UK, the thesis is often the main assessed part of a PhD, but most programs still include training and progress reviews along the way.

Do all master’s degrees require a thesis?

No. Many master’s programs offer a non-thesis route, such as coursework with a comprehensive exam or a capstone project. Research-focused programs are the most likely to require a thesis, so check your program’s requirements early.

What is a PhD without a dissertation called?

Students who have completed everything except their dissertation are often described as all but dissertation, or ABD. It’s an informal status rather than a degree, and our guide to all but dissertation explains what it means and how to finish.

Is a capstone project the same as a thesis?

No. A thesis is a research project that aims to add to knowledge in your field, while a capstone usually applies existing knowledge to a practical problem, often in a professional program. Both are culminating projects, but they ask different things of you.

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