Free Sentence Counter
A sentence counter instantly tells you exactly how many sentences are in a piece of text, along with word count, character count, and average sentence length. Type or paste your text below - the sentence count, and a full breakdown of every sentence, update live as you type.
Sentence Breakdown
Every sentence found in your text, numbered in order, with its word count.
| # | Sentence | Words |
|---|---|---|
| Start typing to see each sentence listed here. | ||
What Is a Sentence Counter?
A sentence counter is a tool used for counting how many sentences appear in a block of text, breaking it down sentence by sentence rather than just totaling words or characters. It's built for anyone who needs an exact sentence count rather than an estimate - students meeting an assignment's sentence-count requirement, editors checking whether a paragraph has gotten too dense, and writers running a readability pass on their own draft. Our free sentence counter updates live as you type, runs entirely in your browser, and lists out every individual sentence it detected so you can see exactly how the count was reached.
| Price | 100% Free |
| Signup | Not required |
| Limits | None — count text of any length, unlimited times |
| Privacy | Fully client-side — your text is never uploaded |
| Extras | Per-sentence breakdown, average/longest/shortest sentence length |
How to Use the Sentence Counter
- Type or paste your text into the box above.
- Watch the sentence count update live - along with word count, character count, and average sentence length, recalculated on every keystroke.
- Review the sentence breakdown below to see each sentence individually, numbered, with its own word count - useful for spotting run-on sentences that need splitting.
How Does a Sentence Counter Count Sentences?
This tool splits your text wherever it finds a period, question mark, or exclamation point, then counts each resulting chunk that contains actual words as one sentence. It's the same basic logic every sentence-counting tool uses, and it's accurate for the vast majority of normal writing. The one edge case worth knowing: abbreviations like "Mr.", "e.g.", or "U.S." contain a period that isn't actually the end of a sentence, so unusually abbreviation-heavy text can occasionally be counted as slightly more sentences than a human reader would count by hand.
Who Uses a Sentence Counter?
Students use it to confirm an essay or assignment meets a required sentence count, not just a word count.
Editors and proofreaders use the per-sentence breakdown to spot overly long, run-on sentences that hurt readability at a glance.
SEO and content writers use average sentence length as a quick readability signal - shorter average sentences generally scan easier for web readers.
Teachers use it to quickly check that student writing hits a target sentence count without counting by hand.
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Frequently Asked Questions
How does a sentence counter count sentences?
It splits text at sentence-ending punctuation - periods, question marks, and exclamation points - while ignoring stray line breaks and extra spaces, then counts each resulting chunk that contains actual words as one sentence.
Is this sentence counter really free?
Yes — completely free, unlimited, no signup, and no watermark.
Is my text uploaded anywhere?
No. Everything is counted directly in your browser using JavaScript. Your text is never sent to a server, logged, or stored.
What counts as one sentence?
Any run of text ending in a period, question mark, or exclamation point counts as one sentence, as long as it contains at least one word. Abbreviations like "Mr." or "e.g." can occasionally be miscounted as a sentence break, which is a known limitation of punctuation-based counting.