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💡 Quick answer: Most PhD dissertations in humanities and social sciences run 70,000-100,000 words. STEM dissertations are typically shorter — 40,000-80,000 words. Always check your institution's specific requirements first.
PhD thesis word count by discipline
| Discipline | Typical Word Count | Notes |
|---|---|---|
| Humanities (Literature, History, Philosophy) | 80,000–100,000 words | Text-heavy arguments require length |
| Social Sciences | 70,000–90,000 words | Mixed methods research |
| Business / Management | 60,000–80,000 words | Empirical research |
| Natural Sciences (Biology, Chemistry) | 40,000–60,000 words | Data and results do heavy lifting |
| Engineering | 40,000–60,000 words | Heavily data and diagram dependent |
| Psychology | 50,000–80,000 words | Empirical chapters reduce prose requirements |
What do PhD word count requirements actually include?
Most universities specify whether word count includes or excludes certain sections. Typically included: main body chapters, introduction, conclusion, and literature review. Typically excluded: bibliography, appendices, tables, and figures. Always check your institution's graduate school guidelines before writing.
How many pages is an 80,000-word PhD thesis? ▼
An 80,000-word PhD thesis is approximately 320 pages double spaced at 12pt Times New Roman with standard margins. With front matter, bibliography, and appendices, the physical document typically runs 350-400 pages total.
Can a PhD thesis be under 50,000 words? ▼
Some institutions, particularly for STEM disciplines or practice-based doctorates, allow theses under 50,000 words. Always check your institution's minimum word count requirements before planning your thesis length.
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