Free online writing analysis tool
Sentence Counter
Count sentences, words, characters, paragraphs, reading time, speaking time, readability, and keyword density in one private browser-based tool.
- Free
- No Signup
- Private Browser-Based Tool
- Works on Mobile
Private browser-based tool
Sentence Counter
Count sentences, words, characters, paragraphs, reading time, speaking time, readability, and keyword density in one private browser-based tool.
What is a sentence counter?
A sentence counter is an online writing tool that counts how many sentences are in a piece of text. It also helps measure words, characters, paragraphs, reading time, speaking time, readability, keyword density, and average sentence length so writers can edit with more clarity.
Who is this tool best for?
Best for students, writers, bloggers, SEO writers, copywriters, editors, teachers, researchers, marketers, and professionals who need fast text statistics.
- Check essay length before submission
- Review blog post structure before publishing
- Count sentences in emails and reports
- Improve average sentence length for readability
- Review SEO copy without keyword stuffing
- Estimate reading and speaking time for scripts
Quick answer
Free Sentence Counter for USA and English-Speaking Writers
SentencesCounter helps English-language writers in the United States, United Kingdom, Canada, Australia, New Zealand, Ireland, South Africa, and global teams count sentences and improve drafts directly in the browser. It is useful for school essays, college assignments, blog posts, SEO pages, emails, scripts, reports, and social media copy.
What You Can Check Instantly
- Total sentences, words, characters, paragraphs, and lines
- Average sentence length, longest sentence, and shortest sentence
- Reading time, speaking time, estimated pages, and readability score
- Keyword density and repeated-word signals for SEO writing
- Private browser-based analysis without account signup
Simple workflow
How to Use Sentence Counter
Paste or type text
Add your draft, article, essay, caption, email, script, or document to the text box.
Review instant results
Check the live stats, warnings, table, or formatted output without refreshing the page.
Edit for clarity
Use the signals to shorten, format, clean, or improve the text for real readers.
Copy or download
Copy the final text or download a TXT file when you are ready.
Quick reference
Typical Sentence Counts by Document Type
Use these ranges as practical editing guides. Exact requirements can vary by school, publisher, platform, or client.
| Use | Guide |
|---|---|
| Social media post | 1-5 sentences |
| Short email | 3-8 sentences |
| 250-word essay | 15-25 sentences |
| 500-word essay | 30-50 sentences |
| 1,000-word blog post | 60-100 sentences |
| 2,000-word article | 120-160 sentences |
| Executive summary | 5-15 sentences |
| Research abstract | 5-12 sentences |
Works for English Writing Worldwide
SentencesCounter is built for English writing used in the United States, United Kingdom, Canada, Australia, New Zealand, Ireland, South Africa, and international English-language teams that publish in English.
Privacy-First Browser Processing
The tool runs in your browser. It does not require signup and does not upload your pasted draft by the counter. This is useful for essays, emails, business documents, scripts, and unpublished website copy.
Helpful answers
Frequently Asked Questions
How do I count sentences online?
Paste or type your text into the box. The tool updates sentence count, word count, character count, paragraph count, reading time, speaking time, readability, and keyword density as you type.
What counts as a sentence?
A sentence usually ends with a period, question mark, or exclamation mark. The counter also tries to avoid false breaks from abbreviations, initials, decimals, URLs, emails, and ellipses.
Does this sentence counter count words too?
Yes. It works as a sentence word counter, word counter, character counter, paragraph counter, reading time calculator, and readability checker on the same page.
Is my text private?
Yes. The counting runs in your browser. Your text is not uploaded by the counter and no signup is required.
Can I use it for essays?
Yes. Students can use it to check essay length, paragraph structure, sentence length, word count, estimated pages, and readability before editing.
Can I use it in the U.S., U.K., Canada, or Australia?
Yes. It works for English writing worldwide, including users in the United States, United Kingdom, Canada, Australia, New Zealand, Ireland, South Africa, and international English-language teams.
What is a good average sentence length?
For general web writing, 15 to 20 words per sentence is often clear. Academic writing may use longer sentences, but very long sentences can hurt readability.
How many sentences are in 500 words?
A 500-word essay often has about 30 to 50 sentences, depending on sentence length and writing style.
Can this replace grammar editing?
No. It measures structure and readability signals. You should still review grammar, facts, tone, and source quality manually.
Is the Sentence Counter free?
Yes. The tool is free, browser-based, and does not require an account.
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