Readability score
Readability tester: Flesch & Gunning Fog
Measure your text's clarity with the 3 reference formulas: Flesch Reading Ease, Flesch-Kincaid Grade Level and Gunning Fog Index. Readable content converts and ranks better.
We extract the title, meta description and main content (navigation and footer excluded).
Flesch Reading Ease
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Flesch-Kincaid
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Grade level
Gunning Fog
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Grade level
Avg sentence
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words / sentence
Details
Why measure readability?
Overly complex text drives readers away. Google integrates this in UX signals: time on page, bounce rate, scroll. Readable content retains better, thus ranks better.
Most major media aim for a Flesch score of 60-70 (accessible to average middle schoolers). For a technical B2B blog, 50-60 is acceptable.
The Flesch scale explained
Flesch Reading Ease ranges from 0 (very complex) to 100 (very easy). How to interpret:
- 90-100 — Very easy (grade 3-4)
- 70-90 — Easy to read (middle school / late primary)
- 60-70 — Standard (average adult reader)
- 30-60 — Difficult (high school / college level)
- 0-30 — Extremely difficult (specialized academic level)
How to improve your score
- Shorten sentences (aim for 15-20 words average).
- Replace complex words with common synonyms.
- Break paragraphs longer than 4 lines.
- Use bullet lists and subheadings to breathe.
- Avoid heavy connectors in favor of simple ones.
Frequently asked questions
Yes, we use an adapted Flesch coefficient for French (and approximately valid for other Romance languages). For pure English use, original Flesch applies.
Flesch Reading Ease for an intuitive 0-100 score. Flesch-Kincaid and Gunning Fog give approximate grade levels — cross-reference them.
Depends on your audience. For general public, aim for 60+. For technical B2B, 50+ is enough. What matters is consistency with your readers.
No, it's one factor among many. But combined with good content, solid structure and backlinks, readability significantly improves engagement and therefore SEO.
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