Readability Score Checker
Paste text to get its Flesch Reading Ease score, the Flesch–Kincaid US grade level and the Gunning fog index, plus sentence length and the share of long words. Useful for keeping web and marketing copy readable.
Reading ease
64.9
Plain English — 8th–9th grade
Grade level (F–K)
1.6
US school grade
Gunning fog
10.5
years of education
Avg words / sentence
11
33 words · 3 sentences · 51 syllables · 15% words of 3+ syllables.
Syllables are counted with a heuristic, so scores are approximate — good for comparing drafts, not for a legal cut-off. Flesch Reading Ease runs 0 (hardest) to 100+ (easiest); plain English sits around 60–70. English text only. Nothing is uploaded.
FAQ
- What score should I aim for?
- For general web copy, a Flesch Reading Ease of 60–70 (around 8th–9th grade). Technical audiences tolerate lower; consumer content should be higher.
- How accurate is it?
- Syllables are estimated with a heuristic, so treat the numbers as a guide for comparing drafts rather than an exact measure. English only.
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Free to use, no sign-up. Calculations run in your browser — nothing you type is sent to a server. These tools are for general information only, not professional advice. See the full tool list.