Quick AnswerUndergraduate dissertations are often 8,000-12,000 words and master's dissertations 15,000-20,000, though your university sets the exact figure. The literature review, results and discussion usually take the largest shares, while the abstract, introduction and conclusion are shorter.
Knowing roughly how to split your word count helps you plan and avoid spending too long on the wrong chapter. These are typical proportions; always confirm against your own specification.