Sentence Counter
Count the sentences in your text and the average words per sentence. Browser-only.
Sentences
0
Words
0
Paragraphs
0
Avg. words / sentence
0
About Sentence Counter
The sentence counter detects sentence terminators (., !, ?) followed by whitespace or end-of-text. The count plus the words-per-sentence average gives a quick readability proxy: short, punchy sentences read fast; long ones with many clauses read slow.
When to use it
- Estimating readability for an audience
- Reviewing the rhythm of a piece of prose
- Comparing two drafts' sentence density
- Adapting writing for translation or summarization
How it works
Sentence terminators (., !, ?) followed by whitespace or end-of-string are counted. If the text doesn't end with a terminator, the trailing run is counted as one additional sentence. The heuristic is approximate — abbreviations like 'Mr.' or 'e.g.' will be over-counted.
Examples
Hello world. How are you? I'm fine!
3 sentences
Frequently asked questions
- Does it handle abbreviations correctly?
- Not perfectly. 'Mr. Smith went home.' counts as 2 sentences because of the period after 'Mr'. For accurate sentence counts in text with abbreviations, use a natural-language tokenizer.
- What about ellipses?
- Three periods (...) are treated as a single terminator if followed by whitespace. A Unicode horizontal ellipsis (…) is not currently treated as a terminator — wrap it in a period if needed.