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Sentence Counter
Count sentences in any text and see how long they are on average — a quick readability check for anything you write.
Runs entirely in your browser — your text is never uploaded
- Sentences
- 0
- Words
- 0
- Paragraphs
- 0
- Avg / sentence
- 0
words
How to use the sentence counter
- Paste your text.
- Review sentence count, average length and the longest sentence.
- Shorten anything flagged as long to improve readability.
Examples
Input
Two short sentences.
Result
2 sentences, average 3 words
Input
A dense paragraph
Result
Average over 25 words per sentence — consider splitting
About the sentence counter
Average sentence length is one of the strongest readability signals. Most plain-English guidance suggests aiming for 15 to 20 words on average, with variety between short and long sentences.
This tool highlights your longest sentence because a single sprawling sentence often does more damage to comprehension than a slightly high average.
Frequently asked questions
How do you detect a sentence?
Text is split on full stops, question marks and exclamation marks followed by whitespace. Abbreviations such as e.g. can cause small over-counts.
What is a good average?
For general audiences, 15 to 20 words per sentence reads comfortably.
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