Sentence Counter

Free online sentence counter. Count characters (with/without spaces), words, sentences, and paragraphs. Get estimated reading time, speaking time, and grade level analysis. Pure frontend.

🔒 100% Client-Side

📝 Enter text to analyze

Characters (with spaces)

Updated: 2026-07-11

Characters (no spaces)

Words

Sentences

Paragraphs

Reading Time

Readability Grade—

Longest Sentence—

🔒 All processing is done locally. Nothing is uploaded.

How to Use Sentence Counter

Paste or type any text in the input area.
View real-time statistics.
Use the analysis to optimize your writing.

Frequently Asked Questions

What metrics does the sentence counter measure?

This tool counts characters (with/without spaces), words, sentences, and paragraphs in real-time. It also provides estimated reading time, speaking time, Flesch-Kincaid Grade Level, and longest sentence detection.

How is readability grade calculated?

Readability is calculated using the Flesch-Kincaid Grade Level formula: 0.39×(words/sentences) + 11.8×(syllables/words) - 15.59. The result indicates the US education grade level needed to understand the text. Grade 6 = a 6th grader can comprehend it.

How accurate is the reading time estimate?

Reading time is estimated at 200-250 words per minute (standard for non-fiction English). Chinese text uses 300-400 characters per minute. Actual speed varies by reader and content difficulty. Speaking time estimates at 130-160 words per minute.