Sentence Count
Count the number of sentences in your text, along with average sentence length, updated live as you type.
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Sentences
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Avg Words/Sentence
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Recommended Settings
Pro Tips
- •Sentences are detected by looking for periods, question marks, and exclamation points followed by a space or the end of the text
- •Abbreviations (like 'Mr.' or 'e.g.') can occasionally be miscounted as sentence endings - review the result if your text has many abbreviations
- •Average words per sentence is a useful proxy for readability - very high averages often mean overly long, complex sentences
- •The count updates live as you type or paste
Most Popular
Most users paste a full paragraph or article to check overall sentence structure and length
When to Use This Tool
Get a sense of how complex your writing is based on sentence count and length.
Check whether your writing relies too heavily on long or short sentences.
Analyze sentence structure as part of a writing assignment or study.
Review sentence count and average length while editing an article or blog post.
How It Works
Scan the text for sentence-ending punctuation - periods, question marks, and exclamation points
Count each detected sentence boundary as one sentence
Calculate the average number of words per sentence by dividing total words by sentence count
100% Private
Files never leave your device. All processing happens locally in your browser.
Lightning Fast
Powered by Client-side sentence boundary detection for optimal performance on modern browsers.
Open Source
Built with verified, open-source libraries. Fully transparent.
Frequently Asked Questions
How are sentences detected?
The tool looks for periods, question marks, and exclamation points as sentence boundaries. This is a simple heuristic and isn't perfect for text with many abbreviations.
Why might the count be slightly off?
Abbreviations like 'Dr.' or 'e.g.' contain periods that can be mistaken for sentence endings, since true natural-language sentence detection requires more context than simple punctuation matching.
What does average words per sentence tell me?
It's a common readability signal - very high averages often indicate long, complex sentences that may be harder to read.
Is my data sent to a server?
No. Counting happens entirely in your browser.
What's a good average sentence length?
Many style guides suggest averaging around 15-20 words per sentence for general audiences, though this varies by genre and purpose.