Sentence Counter
Count sentences in any document instantly — spot run-ons, hit essay minimums and pace your prose.
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Sentences
0
Paragraphs
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Avg words / sentence
What is Sentence Counter?
You finish a draft and need to know if you've hit the sentence requirement. Scanning for periods is slow and easy to miscount.
Paste your text and see the count update live.
If you're editing prose, you spot one-sentence paragraphs that need expansion. If you're grading essays, you verify minimums before reading. If you're writing technical docs, you confirm each step is one clean sentence for screen readers.
How to use Sentence Counter
Four steps. No setup, no signup.
Step 1
Paste your essay, article or paragraph
Step 2
Read the live sentence count
Step 3
Spot one-sentence paragraphs and expand them
Step 4
Compare counts across drafts
Example
A short paragraph broken into sentence stats.
Input
Toolkno is fast. It's free. No signup. Try it.
Output
Sentences: 4 Average length: 2.5 words Longest: 3 words Shortest: 2 words
Why Sentence Counter is useful
- ✓
Hit essay or assignment minimums without manually counting.
- ✓
Spot one-sentence paragraphs that need expansion.
- ✓
Catch run-ons before publishing or submitting.
- ✓
Compare drafts to see how your editing tightened structure.
Common questions
How does it detect sentence boundaries?
It splits on . ! ? followed by whitespace and a capital. Abbreviations like 'Mr.' don't get miscounted.
Tip: Add periods to dangling headlines if you want them counted.
Does an ellipsis count as one or three?
It counts as one sentence break, not three.
Tip: Use the single character '…' for cleanest detection.
What's a healthy average sentence length?
15-20 words for general audiences. 8-12 for marketing copy and landing pages.
Tip: Mix short snaps with longer flow sentences.
Will a fragment without a period count?
It won't. Terminal punctuation is required.
Tip: Add a period if you want fragments included.
Last reviewed: April 2026 · Free, browser-based, no signup.
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