Sentence Counter
Paste any text and get a count of sentences, words, characters, paragraphs, and average sentence length. Works on essays, blog drafts, social posts, novel chapters, or any prose. All counting happens locally in your browser — nothing uploads.
Why Sentence Count Matters
Word count is the default writing metric, but it answers a different question than sentence count. Word count tells you how long the piece is; sentence count tells you about its rhythm. A 500-word paragraph made of three 167-word sentences reads completely differently from a 500-word paragraph of forty 12-word sentences. Most readability guidelines target average sentence length: 14-20 words for general audiences, shorter for younger or non-native readers, longer for academic writing where complexity is expected.
Editors care about variance, not just average. A piece where every sentence is 18 words long reads mechanically. A piece where sentences vary from 5 to 35 words reads like human speech. This counter surfaces both the average and the distribution so revision can target either.
How It Works
The tool splits the text on sentence-ending punctuation (., !, ?) while handling common edge cases: abbreviations like Mr., Dr., and etc. don't end sentences; decimal points inside numbers don't either; ellipses are treated as single punctuation marks rather than three sentence-enders. Quoted sentences ending inside quotation marks are counted as one sentence each.
Word counting splits on whitespace runs, ignoring purely-punctuation tokens. Character counting offers both with-spaces and without-spaces totals, which match Twitter/X's count and Microsoft Word's count respectively. Paragraph counting splits on blank lines. The word counter runs the same engine with the word metric front and centre.
Common Use Cases
Targeting a sentence-length range for blog posts (15-20 average is a typical sweet spot). Tightening academic writing where long sentences crept in during revision. Drafting children's content where shorter sentences match the reading level. Comparing the rhythm of a draft against a published piece you admire. Working backward from a paragraph-count requirement on an assignment.
For longer-form work, pair the counter with the text diff tool to track exactly which sentences got cut or added between drafts. For social posts where character count is the binding constraint, use the social character counter which knows each platform's limits.
How We Compare
Word processors (Word, Google Docs, Pages) all show word and character counts, but few surface sentence count by default. Readability tools (Hemingway, Grammarly, ProWritingAid) show sentence-level statistics as part of larger analyses but require accounts and upload the text. For a quick, private read on a draft — and especially for content you'd rather not send through a third-party service — a local web counter is the lowest-friction option.
Frequently Asked Questions
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Related Guide Sentence Counter: Writing Guide →Built by Derek Giordano · Part of Ultimate Design Tools