Readability Score Checker
Flesch reading ease score for any text.
The Flesch Reading Ease score rates text from 0 (very difficult) to 100 (very easy) using sentence length and syllable counts.
How to use
- Paste the text you want to test.
- Click Check readability for the Flesch score.
- Aim for 60+ for general audiences.
About this tool
Most adult audiences read comfortably at 60–70 — about 8th-grade level. Legal documents often score below 30.
Your text is analyzed locally and never uploaded.
How it works
The Flesch Reading Ease score is computed as 206.835 − 1.015 × (words ÷ sentences) − 84.6 × (syllables ÷ words). Long sentences and multi-syllable words drag the score down; short sentences and simple words push it up.
Rudolf Flesch developed the formula in the 1940s and it remains the most widely used readability metric. Syllables are estimated algorithmically, so scores are approximate — but consistent, which makes them useful for comparing drafts against each other.
Worked examples
Plain language: A government form scoring 35 gets rewritten until it scores 60+, matching plain-language guidelines.
Blog draft: Two versions of an intro score 52 and 68 — the higher one will read easier for a general audience.
Quick reference
| Score | Difficulty | Reading level |
|---|---|---|
| 90–100 | Very easy | 5th grade |
| 80–90 | Easy | 6th grade |
| 70–80 | Fairly easy | 7th grade |
| 60–70 | Standard | 8th–9th grade |
| 50–60 | Fairly difficult | 10th–12th grade |
| 30–50 | Difficult | College |
| 0–30 | Very difficult | College graduate |
Frequently asked questions
What is a good readability score?
60–70 for general audiences; 80+ for wide public reach.
Does it work for other languages?
The formula is tuned for English; scores for other languages are approximate.
Is my text uploaded?
No — everything runs in your browser.
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