Sentence Counter
Free online sentence counter: paste text to instantly count sentences, words, paragraphs and average sentence length. Runs in your browser, nothing uploaded.
Updated 2026-06-14 · Free · No sign-up · Runs privately in your browser
How the Sentence Counter Works
Paste or type into the box and this tool instantly reports the number of sentences, words, and paragraphs, plus the average words per sentence. Everything updates live as you edit, and nothing leaves your browser.
Counting sentences is useful for keeping writing readable. Editors and readability guidelines often recommend an average of 15 to 20 words per sentence — long enough to be substantial, short enough to stay clear. This tool gives you that number at a glance.
How it works
The counter applies a few simple rules:
- Sentences — the text is split at sentence-ending punctuation (
.,!,?,…). Each resulting chunk that contains at least one word counts as one sentence. Repeated terminators such as?!or...count as a single break. - Words — any run of non-space characters separated by whitespace.
- Paragraphs — blocks of text separated by one or more blank lines.
- Average words per sentence — total words divided by total sentences.
Because automatic detection can be fooled by abbreviations (Dr., e.g.), the count is a close estimate rather than a grammatical analysis.
Worked Example
Paste this text:
Writing is thinking. Have you ever noticed that? When you write, ideas sharpen!
The tool finds three terminators (., ?, !) and reports:
| Metric | Value |
|---|---|
| Sentences | 3 |
| Words | 13 |
| Paragraphs | 1 |
| Average words/sentence | 4.3 |
Why Sentence Count Matters
- Readability — shorter average sentences are easier to scan and understand.
- Assignments — many essays and reports specify a sentence or word range.
- SEO and content — varied sentence length keeps readers engaged and lowers bounce rates.
Frequently asked questions
How does the sentence counter decide where a sentence ends?+
It splits your text at sentence-ending punctuation - periods, exclamation marks, question marks and ellipses - and counts each segment that contains at least one word. Repeated terminators like '?!' or '...' are treated as a single break, so they do not inflate the count.
Why does it count one sentence even when I use no punctuation?+
If your text has words but no ending punctuation, it is still a single sentence, so the tool returns 1. Add periods or other terminators to break the text into multiple sentences and the count updates instantly.
Does an abbreviation like 'Dr.' or 'e.g.' get miscounted as a sentence end?+
It can. Like most automatic counters, this tool treats every period as a possible sentence boundary, so abbreviations may slightly raise the count. For precise figures in text full of abbreviations, review the result manually.
What counts as a paragraph?+
A paragraph is a block of text separated from the next by a blank line. The tool counts blocks split on one or more empty lines, which matches how most word processors and web editors define paragraphs.
Is my text uploaded anywhere?+
No. All counting happens locally in your browser using JavaScript, so your text is never sent to a server, logged, or stored. You can even use the tool offline once the page has loaded.