Abbreviations break counts
'Dr.' or 'U.S.A.' may be treated as sentence ends.
Fix: Pre-process common abbreviations or accept a small margin of error.
Sentence Counter
Count sentences in paragraphs of text using robust punctuation-aware splitting
Input
Loading editor...
Output
Output will appear here...
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What is Sentence Counter
Last reviewed:
Sentence Counter splits text on . ! ? boundaries followed by whitespace and a capital letter or digit, producing a robust sentence count that handles most English prose correctly.
It is a helpful companion to word and paragraph counters when you're tuning readability, hitting editorial targets, or auditing AI-generated content.
Why use it
- Check sentence counts for SEO briefs or teacher assignments.
- Audit readability — shorter sentences often score better.
- Validate that generated content has varied sentence rhythm.
- Compare copy against style guide limits.
- Combine with word counters to compute average sentence length.
Features
- Punctuation-aware splitter
- Handles Latin-script languages
- Fast client-side analysis
- Combines with word and paragraph counters
- No data sent to servers
How to use Sentence Counter
- Paste your text. Drop the content into the input panel.
- Run. The tool returns the number of sentences.
- Iterate. Use the count to hit editorial or readability targets.
Example (before/after)
Input
Hello world. How are you doing today? I am great!
Count
Sentences: 3
Common errors
No punctuation present
Unpunctuated text counts as one sentence.
Fix: Add proper punctuation for accurate counts.
FAQ
How are sentences detected?
By splitting on . ! ? followed by whitespace and an uppercase letter, digit, or the start of a Unicode uppercase character.
Does it work for non-English?
It handles most Latin-script languages. CJK and Arabic may need custom punctuation rules.
Is it exact?
It's a heuristic — expect small variances with abbreviations or unusual punctuation.
Can I combine with word count?
Yes — use both tools to compute average sentence length.
Is data stored?
No — analysis runs entirely in your browser.
Related tools
Pair sentence counting with other readability metrics for full editorial insight. You can also browse the full String Utilities category for more options.
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