Readability Checker
Estimate English readability with Flesch Reading Ease and Flesch–Kincaid Grade formulas.
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How to use
Paste predominantly English prose with normal sentence punctuation. Review both scores alongside the displayed word, sentence, and estimated syllable counts.
Example
Input
The cat sat on the mat. It was a sunny day.
Output
Flesch Reading Ease: 109.0
Flesch–Kincaid Grade: 0.0
Words: 11
Sentences: 2
Estimated syllables: 12
Formulas:
Reading Ease = 206.835 − 1.015(words/sentences) − 84.6(syllables/words)
Grade = 0.39(words/sentences) + 11.8(syllables/words) − 15.59
Limitations
Scores are English-only estimates. Syllables are heuristic, specialized names can skew results, and a grade is not a judgment of writing quality.
Frequently Asked Questions
Can I use this for Arabic text?
No. The formulas were designed for English, so predominantly non-English input is rejected rather than given a misleading score.
What does Reading Ease mean?
Higher scores generally indicate easier English prose. Audience, subject matter, and accessibility still require human judgment.