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Sentence Counter

Count the number of sentences in your text.

How to Use Sentence Counter

1

Paste your paragraph, article or email into the input box and the sentence count updates as you type.

2

Click the "Process" button to see the sentence total together with the average words per sentence.

3

Compare that average against the 15 to 20 word comfort zone and look for any section that sits far outside it.

4

Copy the analysed text or download the report when you have finished tightening the long sentences.

Features

100% free with no account, limits or installation
Live sentence count that updates while you type
Average words per sentence shown for readability checking
Handles question marks, exclamation marks and ellipses as sentence endings
Works equally well on a single paragraph or a full multi-page draft
Processed in your browser, so your draft is never uploaded or stored

Frequently Asked Questions

Yes, entirely free and unlimited. No registration, no trial and no paid tier is involved anywhere in the tool.
No. Analysis happens locally in your browser, so the content stays on your device. Nothing is transmitted to our servers or stored in a database.
It looks for full stops, question marks and exclamation marks followed by a space or the end of the text. That means abbreviations such as Dr. or e.g. can occasionally be treated as a break - if that happens, rephrase the abbreviation or check the sentence count manually.
Yes. Long documents are processed without difficulty, and the count and averages keep updating live, so you get results immediately regardless of length.

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About Sentence Counter

Sentence count is a small number with an outsized effect on how a piece of writing feels. It tells you whether an essay has five ideas or fifteen, whether a blog post is one rambling block or a set of digestible statements, and it is one of the inputs behind a rough readability score. This tool counts sentences the way a reader would, recognising full stops, question marks and exclamation marks, and it also reports the average number of words per sentence so you can judge sentence length directly.

The interesting part is what the average reveals. General writing guidance suggests landing somewhere between 15 and 20 words per sentence for comfortable reading online. A number well above that usually points to sentences carrying two or three separate ideas joined by commas, which readers experience as a wall. A number well below it can feel choppy and breathless, especially over a long stretch.

Paste in a paragraph, a chapter or a single email and the count updates as you type. It is a quick structural check for students tightening an assignment, for editors reviewing a draft before a deadline, and for anyone who simply wants to know whether a piece is one sentence or many.

When to Use This Tool

  • Checking whether an essay opens with a clear thesis rather than a run-on opening
  • Spotting paragraphs where one sentence is trying to do three jobs at once
  • Reviewing readability by comparing average sentence length against 15 to 20 words
  • Confirming a news brief, product description or tagline is actually one clean sentence
  • Counting sentences in a text for school, legal or research requirements