The length of a summary should usually be 10–20% of the length of the source document. For example, if your source material is a 1,000-word essay, the summary should be between 100 and 200 words. If the document is a full-length book or dissertation, however, the summary may span several pages.
The appropriate length of a summary depends on its purpose. A summary of a business document may require a different structure than a summary of a journal article written by a student. The main principle is that a summary should include only the information the reader needs to understand the main ideas and conclusions of the original work. Learn about related tools in our post on the best AI detector tools for content. Quetext's AI Summarizer lets you control summary length based on your needs.