Home / Tools / Paraphrasing vs summarizing: what is the difference?
Paraphrasing restates a passage at close to its original length, keeping every point in a new sentence structure. Summarizing cuts the passage to its main claim and drops the detail. Both need a citation. Use a paraphrase when the detail matters and a summary when only the conclusion matters.
Updated 2026-10-28
A paraphrase keeps the content and changes the words. A summary keeps the conclusion and drops most of the content. The first is a rewording task, the second is a selection task.
Length: a paraphrase is usually 80 to 120 percent of the source. A summary is usually 10 to 25 percent.
Detail: a paraphrase keeps the examples, numbers and qualifiers. A summary drops them unless they carry the claim.
Structure: a paraphrase may keep the order of the source or rebuild it. A summary almost always rebuilds, because it starts from the main claim.
Citation: both need one. A summary that names no source is the same offence as a paraphrase that names no source.
Typical use: a paraphrase supports an argument with one source's detail. A summary reviews several sources before your own analysis.
Source sentence: "In a sample of 240 first-year students, those who wrote a summary of each lecture scored eight points higher on the final exam than those who reread their notes, though the difference narrowed in the second term."
Paraphrase: first-year students who summarised each lecture scored about eight points higher on the final exam than students who only reread their notes, in a group of 240, and the gap shrank in the second term.
Summary: summarising lectures was linked to better exam scores than rereading notes.
The paraphrase keeps the sample size, the eight points and the second-term narrowing. The summary keeps the relationship and drops the rest. Neither may appear without the citation.
A literature review often does both in sequence. Summarize three studies in one sentence each to show the shape of the evidence, then paraphrase the one study your argument depends on, with its numbers intact.
A common error is a "summary" that keeps every detail and runs as long as the source. That is a paraphrase with a misleading label, and it wastes the reader's time.
Ask two questions. Does my version contain a claim the source does not make? If yes, it is neither a paraphrase nor a summary. Does my version keep detail that my argument does not use? If yes, cut it and you have a summary.
Then check length against the source. A version much longer than the source has added material. A version much shorter has removed material, and you should be able to say which material you removed and why.