How Long Should my PhD Literature Review be?

“How long should my literature review be?”

“How many references should my literature review include?”

“How much should I write about each source?”

These are very common questions because there are no clear or consistent guidelines on exactly how much you need to put into your literature review.

But the fact that there are no clear guidelines tells you something about the nature of literature reviews. It tells you that these are the wrong questions to ask and that if you want to write a good review, the length might not be the most important thing.

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Dilution vs distillation

Sometimes, adding more content (to any chapter of your thesis) can make it weaker. By adding references just to bulk out the chapter, whether or not you have anything interesting to say about them, you can end up diluting the good stuff.

But if you stick to the things you know about and deliberately exclude sub-standard or irrelevant literature, the review will usually be much stronger.

Remember that your examiner has to spend their valuable time reading your work. They will only wish it was longer if it’s well-written and interesting.

Some better questions

So instead of asking how long a literature review should be, or how many references it should contain, it’s better to ask the following;

  • How do I select the best and most relevant literature?
  • How do I structure the literature into a compelling narrative?
  • How can I balance the need for detail with the need for breadth?

These questions aren’t easy to answer, but they focus your mind on the important problems.

See also:
How to write a compelling literature review


By Daniel SchwenOwn work, CC BY-SA 4.0, Link

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4 thoughts on “How Long Should my PhD Literature Review be?

  1. Hi Dr. I’m very interested to read the guideline on how to write a comprehensive literature review. But still there is a big problem on how to select and stick to the most relevant literature review due to the changing nature of scientific Knowles on different thematic areas. Can we fix when and how to stop using literature review before finishing the entire thesis please?
    Thank you!

    • OK, so there is new iterature published every day, but most of it is not that important. Ask yourself, “does this paper fundamentally change the knowledge on which my work is based?”

      If not, and the answer is probably not, then you don’t have to include it.

  2. Hi James. What is your view on conceptual framework for a study. Any suggestions of developing a conceptual framework for a qualitative study? and how that it links with the inductive nature of qualitative studies? your thoughts will be really valuable

  3. thanks.i think i have a suggestion that is worth following .i am happy for getting tips that will guide me to write my literature review.

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