The number of words in a thesis or dissertation typically ranges from around 15,000 to 20,000 words for a master’s dissertation and from roughly 70,000 to 100,000 words for a doctoral thesis, although the exact figure depends heavily on your discipline, your degree level, and your university’s own rules. There is no single universal length, so the most reliable answer is always the word limit set out in your programme handbook or candidature guidelines.
As a general guide, the length grows with the level of the qualification and the depth of original research expected. Undergraduate projects are the shortest, honours and coursework dissertations sit in the middle, and doctoral theses are by far the longest because they must demonstrate a substantial, original contribution to knowledge.
Typical word counts by level
The following ranges are commonly seen across universities, though you should always confirm against your own institution’s requirements:
- Undergraduate dissertation: approximately 8,000 to 12,000 words.
- Honours thesis: approximately 10,000 to 20,000 words, depending on discipline.
- Master’s by coursework dissertation: approximately 12,000 to 20,000 words.
- Master’s by research thesis: approximately 30,000 to 50,000 words.
- Doctoral thesis (PhD): approximately 70,000 to 100,000 words.
These are indicative bands rather than fixed rules. Some universities express requirements as a maximum rather than a target, and going significantly over or under can require special permission, so treat the stated limit as a genuine boundary.
What counts towards the word limit
Understanding what the word count includes is just as important as the number itself. In most cases the limit covers the main body of your work, from the introduction through to the conclusion, including in-text material. Universities commonly exclude several components from the count, such as the title page, abstract, table of contents, reference list or bibliography, appendices, and sometimes footnotes and tables.
Because these conventions vary, you should check your specific guidelines before assuming that lengthy appendices or reference lists fall outside the limit. Misjudging this can lead to a submission that is technically over length, which examiners and administrators take seriously. If you are unsure how to distribute your words across chapters, support with a dissertation can help you plan a balanced structure that fits within the limit.
How discipline affects length
Your field of study shapes expectations considerably. Theses in the sciences, engineering, and mathematics are often shorter, because dense data, equations, figures, and concise reporting convey a great deal in relatively few words. Theses in the humanities and social sciences tend to be longer, since sustained argument, close analysis, and extended discussion require more prose. A thesis in history or philosophy may sit near the upper end of the doctoral range, while one in physics or computer science may sit comfortably below it.
This is why comparing your word count to a friend in another faculty can be misleading. The right benchmark is the norm within your own discipline and the guidance of your supervisor, who understands what a complete argument looks like in your field.
Australian university conventions
Australian universities frequently set a maximum length for doctoral theses of around 80,000 to 100,000 words, with many capping the PhD at 100,000 words excluding references and appendices. Master’s by research theses are commonly limited to somewhere between 30,000 and 50,000 words, while honours theses often fall between 10,000 and 20,000 words depending on the school. These conventions broadly align with the depth of original research expected at each level under the Australian Qualifications Framework, where doctoral degrees sit at the highest level and demand the most substantial contribution.
Individual universities publish precise figures in their higher-degree research policies, and these are the definitive source. If your work involves a large research component, planning early helps you avoid the common problem of writing far more than the limit allows and then having to cut heavily. Guidance on structuring a thesis can help you allocate a realistic word budget to each chapter from the outset.
Focus on quality, not just quantity
In summary, a master’s dissertation is usually somewhere between 15,000 and 20,000 words, while a doctoral thesis commonly runs from 70,000 to 100,000, but your own handbook always has the final word. Just as important, examiners reward clear, well-argued, and appropriately scoped writing rather than sheer length. Meeting the word count is necessary, yet a concise, tightly reasoned thesis will always impress more than a padded one, so aim to use every word to advance your argument.