Sentence Counter
Count sentences, words, paragraphs, and characters with reading time and readability metrics.
Privacy First: 100% Client-Side Processing
Processed in your browser. Files are never uploaded.
How to Use the Sentence Counter – Words, Sentences & Readability
- 1Paste or type your draft into the text analyzer box.
- 2View instant counts for sentences, words, characters, and paragraphs.
- 3Check the average sentence length and reading duration metrics.
- 4Review the Flesch-Kincaid reading score to optimize readability.
Formula & How It Works
Sentence Tokenization & Flesch-Kincaid Reading Ease
Sentences are identified using punctuation terminators (.!?). Reading time assumes a standard silent reading speed of 200 words per minute. Readability is scored using the Flesch Reading Ease formula.
Worked Examples
Short Paragraph Analysis
Input: Antigravity powers modern web applications. It executes tasks reliably and cleanly.
Explanation: Identifies 2 distinct sentences terminated by periods.
Reading Time Estimate
Input: 400 words of article draft
Explanation: Calculates reading duration at 200 wpm and speech duration at 130 wpm.
Academic Essay Readability Check
Input: Complex legal or scientific text with long sentence structures
Explanation: Highlights dense sentence structures to help writers simplify prose.
Single Exclamation Sentence
Input: Welcome to our powerful toolset!
Explanation: Correctly identifies sentence termination via exclamation mark.
Frequently Asked Questions
How does the tool distinguish between decimal numbers and sentences?▼
The regex requires terminal punctuation (.!?) to be followed by whitespace or string end, avoiding false sentence splits on decimals like 3.14.
What is an ideal average sentence length?▼
For clear, accessible online writing, an average sentence length of 15 to 20 words is recommended.
What does the Flesch Reading Ease score mean?▼
Scores between 60 and 70 indicate standard, easy-to-read prose for the general public. Scores below 50 indicate dense, college-level writing.
Does the character count include spaces?▼
Both counts are displayed: total characters including spaces, and characters excluding spaces.
Can I analyze sensitive corporate documents here?▼
Yes, all analysis is computed client-side in your browser; no text is ever transmitted across the internet.
How fast is speaking time calculated?▼
Speaking time is calculated at an average presentation speed of 130 words per minute.
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