Readability checker: Flesch score and grade level
Check how easy your text is to read with Flesch Reading Ease, Flesch–Kincaid, Gunning Fog, SMOG, Coleman–Liau and ARI, plus long sentences to fix.
Input
How to use this tool
- Enter your values or choose a local file. Replace the example data with your own.
- Review options, units and assumptions, then run the tool.
- Check the result before copying or downloading it. Keep an original copy of important files.
Method & assumptions
Check how easy your text is to read with Flesch Reading Ease, Flesch–Kincaid, Gunning Fog, SMOG, Coleman–Liau and ARI, plus long sentences to fix.
Flesch = 206.835 − 1.015 × words/sentence − 84.6 × syllables/word; FK grade = 0.39 × words/sentence + 11.8 × syllables/word − 15.59Worked example
Text to check: Good writing is easy to follow. Short sentences help readers keep track of the main ide… → Reading ease (0–100, higher is easier): 63 · Plain language → Flesch–Kincaid grade level: 8.1 → Gunning Fog index: 11.3 → SMOG index: 11.2 → Coleman–Liau index: 11.2 → Automated Readability Index: 9.1
Limits & important notes
Grade formulas are for English. French (Kandel–Moles), Spanish (Fernández Huerta), German (Amstad), Italian (Flesch–Vacca, Gulpease) and Portuguese get a language-specific reading-ease score. Syllables are estimated from spelling.
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