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100% free · no signupRuns in your browser

Sentence Counter

Count sentences, paragraphs and average words per sentence.

Best for: Use it to check essay or content length, readability, or to meet a sentence target.

Complete guide

Input

How it's calculated & sources
The Sentence Counter uses the standard, deterministic formula, so the same inputs always produce the same result. It runs entirely in your browser, so your inputs are never uploaded. Last reviewed June 2026.

Free & no sign-up · runs entirely in your browser. Results are estimates for general information, not professional advice — verify important decisions with a qualified expert. Last reviewed June 2026.

Continue your journey

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Complete guide

Quick answers

Short, sourced answers to the questions people (and AI assistants) ask most.

What is Sentence Counter?
A sentence counter reports how many sentences (and often words and characters) are in your text.
Why does Sentence Counter matter?
An estimate of sentence count. Abbreviations (Dr., e.g.) and decimals can fool any simple splitter, so treat it as close, not exact.
How is Sentence Counter calculated?
It splits the text on sentence-ending punctuation (. ! ?) while trying to avoid false splits, in your browser.
What are common sentence counter mistakes?
Trusting an exact count when abbreviations and decimals cause miscounts.
When should you use the Sentence Counter?
Use it to check essay or content length, readability, or to meet a sentence target.

What is the Sentence Counter?

A sentence counter reports how many sentences (and often words and characters) are in your text.

How the Sentence Counter works

It splits the text on sentence-ending punctuation (. ! ?) while trying to avoid false splits, in your browser.

Common mistakes to avoid

  • Trusting an exact count when abbreviations and decimals cause miscounts.
  • Ignoring that ellipses and multiple punctuation can skew results.
  • Confusing sentence count with line count.

Keywords: sentence, count, paragraph.

Runs entirely in your browser - your text is not uploaded.

Reviewed by the Free Tools Galaxy editorial team · Updated June 2026 · Calculated privately in your browser.

Frequently asked questions

Is the Sentence Counter free to use?+

Yes. Every tool on Free Tools Galaxy is 100% free, runs in your browser and requires no signup.

How accurate is the Sentence Counter?+

Sentence Counter uses the standard sentence counter formula in double-precision arithmetic, so the same inputs always produce the same result and you can verify any figure by hand. It is an educational estimate — real-world outcomes depend on your actual rates, rules and assumptions.

Do you store my inputs?+

No. The Sentence Counter runs entirely in your browser. Nothing is uploaded or saved to a server.

Can I use the Sentence Counter on mobile?+

Yes — the interface is fully responsive and works on phones, tablets and desktops.

What are common mistakes to avoid?+

The most frequent mistake is mixing units. Double-check your inputs use a single, consistent unit before clicking Calculate.

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Smart Autopilot

AI-style routing · 100% on-device

Based on this tool, your recent activity and how others chain tools together.

Likely next step

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Share-to-grow kit (Reddit, LinkedIn, Medium)
Reddit post
Title: I built/used this free sentence counter — instant, no signup

Body: Count sentences, paragraphs and average words per sentence. Try it: https://freetoolsgalaxy.com/tools/sentence-counter
LinkedIn post
Sentence Counter on Free Tools Galaxy — Count sentences, paragraphs and average words per sentence. https://freetoolsgalaxy.com/tools/sentence-counter
Medium intro
# Sentence Counter — the free tool I keep coming back to

Count sentences, paragraphs and average words per sentence.

Try it: https://freetoolsgalaxy.com/tools/sentence-counter
Quora answer
The fastest way is to use a free in-browser sentence counter: https://freetoolsgalaxy.com/tools/sentence-counter. Count sentences, paragraphs and average words per sentence.

Embed this tool anywhere

Free embed code for blogs, docs and dashboards. Every embed sends a backlink home — helping you and the galaxy grow together.

HTML iframe
Drop into any site — auto-resizes to its content height, theme-aware.
<iframe src="https://freetoolsgalaxy.com/tools/sentence-counter?embed=1" title="Sentence Counter" loading="lazy"
  style="width:100%;height:600px;border:0;border-radius:16px;background:#0b1020"
  allow="clipboard-write"></iframe>
<script>window.addEventListener("message",function(e){if(e.data&&e.data.type==="ftg-embed-height"){document.querySelectorAll("iframe").forEach(function(f){if(f.contentWindow===e.source){f.style.height=e.data.height+"px";}});}});</script>
<p><a href="https://freetoolsgalaxy.com/tools/sentence-counter" target="_blank" rel="noopener">Powered by Sentence Counter on Free Tools Galaxy</a></p>
Responsive wrapper
Aspect-locked container — good for blog post bodies.
<div style="position:relative;padding-bottom:75%;height:0;overflow:hidden;border-radius:16px">
  <iframe src="https://freetoolsgalaxy.com/tools/sentence-counter?embed=1" title="Sentence Counter" loading="lazy"
    style="position:absolute;inset:0;width:100%;height:100%;border:0" allow="clipboard-write"></iframe>
</div>
WordPress / Markdown
Paste in a custom-HTML block or markdown file.
[Sentence Counter — free online tool](https://freetoolsgalaxy.com/tools/sentence-counter)

<iframe src="https://freetoolsgalaxy.com/tools/sentence-counter?embed=1" width="100%" height="600" frameborder="0"></iframe>
Text link-back
Minimal credit link — best for sidebars and footers.
<a href="https://freetoolsgalaxy.com/tools/sentence-counter" target="_blank" rel="noopener">Try the free Sentence Counter</a>

Share-to-Grow Kit

Pre-written, ready-to-paste posts for every major channel. Help others discover this tool — and earn backlinks.

Title
I built a free watermark adder that works instantly in the browser — no signup, no ads in your face
Body
Hey r/[subreddit],

I kept needing a quick watermark adder and most options online were slow or behind paywalls, so I built one that:

• Runs 100% in your browser (your data never leaves your device)
• No signup, no email wall, no popups
• Loads in under a second on mobile

It covers the standard watermark adder use cases (watermark, brand, image) and links out to the formula + worked examples if you want to learn the math.

Link: https://freetoolsgalaxy.com/tools/watermark-adder

Happy to take feedback — what's missing?
Post to a relevant subreddit (e.g. r/InternetIsBeautiful, r/webdev, r/productivity). Avoid spammy subs.
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