23 sentences

Sentence Counter

100% Free

Count sentences, words, characters, and paragraphs in any text. Live stats with longest/shortest sentence detection and abbreviation-safe splitting. Free, private, instant.

Live Count

Abbreviation-Safe

Full Stats

100% Private

Your text

Supports abbreviations like Mr., Dr., St. — they won't be split as sentence ends.

Live stats

8Sentences

49Words

2Paragraphs

280Characters

231Chars (no spaces)

6.1Avg words/sentenceElementary

Longest (10 words)

It was a perfectly ordinary sentence, or so it seemed.

Shortest (3 words)

Yes, it was!

Detected sentences

1.The quick brown fox jumps over the lazy dog.
2.It was a perfectly ordinary sentence, or so it seemed.
3.But was it really?
4.Yes, it was!
5.And then some more text followed.
6.A new paragraph starts here.
7.It demonstrates how paragraphs are counted separately.
8.Short sentences pack a punch!

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  src="https://tools.town/embed/sentence-counter/"
  width="100%"
  height="600"
  style="border:none; border-radius:12px;"
  loading="lazy"
  title="Sentence Counter">
</iframe>

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How to Use

1 Paste or type your text into the text area
2 See sentence count, word count, character count, and paragraph count update live
3 Check the average words per sentence — a quick readability proxy
4 See the longest and shortest sentences detected in your text
5 Review the detected-sentence list to spot run-ons or fragments

Features

Sentence count using punctuation-based splitting (., !, ?)
Abbreviation handling — Mr., Dr., Mrs., St., etc. not split as sentence ends
Word count, character count (with and without spaces)
Paragraph count based on double-line-break detection
Average words per sentence with a reading-level band
Longest and shortest sentence identification
Detected-sentence list for auditing up to 30 sentences
100% client-side — your text never leaves your browser

Why it Matters

Sentence length is a primary driver of readability. Short, punchy sentences increase comprehension speed. Long sentences slow readers down and can obscure meaning. Editors use sentence counts to spot run-ons; writing coaches use average sentence length to target specific readability grades.

★★★★★

Use Cases

Writers & Editors

Spot run-on sentences, check average length, and balance your prose rhythm

Students & Academia

Check sentence variety in essays and reports before submission

Content & SEO Teams

Ensure readability matches your audience's grade level for better engagement

UX Writers

Validate that interface copy stays short, scannable, and direct

What this tool does

Paste any text and see sentence count, word count, character count (with and without spaces), and paragraph count update live. The tool handles common abbreviations like Mr., Dr., and St. so they don’t create false sentence splits. Average words per sentence gives a quick readability grade band.

Sentence length and clarity

The best writing varies sentence length deliberately — short sentences land punches, long sentences build nuance. An average of 15–20 words per sentence suits most general audiences. Academic and legal writing can run longer; marketing copy and UI text should run shorter.

Pair this with the Word Counter for character limits, Reading Time Estimator for audience time expectations, and Remove Extra Spaces to clean up pasted text before analysis.

Frequently Asked Questions

How does the tool split sentences?

Sentences are split on periods, exclamation marks, and question marks followed by whitespace or end-of-text. Common abbreviations (Mr., Dr., Mrs., St., etc.) are protected from being treated as sentence endings. Ellipses are collapsed to a single break.

What is the ideal sentence length for readability?

For most audiences, an average of 15–20 words per sentence is comfortable. Below 10 words per sentence is telegraphic — good for instructions and UI copy. Above 25 words per sentence increases cognitive load noticeably.

Does it count headings and list items as sentences?

Headings that end with punctuation will be counted. Short list items without terminal punctuation may not be detected as sentences. For prose editing this is usually fine; for documents with many bullet points, use word count as the primary metric.

What is the average words per sentence reading-level band?

The tool maps average sentence length to a reading level: under 10 = Elementary, 10–13 = Middle School, 14–17 = High School, 18–21 = College, 22+ = Graduate. This is a rough proxy — actual readability also depends on vocabulary complexity.

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Want to go deeper?

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Sentence Length & Readability

sentence length

Sentence Length & Readability: How to Write Clearer Prose

Learn how sentence length affects readability, what average sentence length targets work for different audiences, and how to use a sentence counter to improve your writing.

25 Jun 2026

5 min read

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