Score your text on the Flesch Reading Ease scale (0–100). Higher means easier. Get a plain‑English category, ideal range, and per‑sentence breakdown.
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이 도구는 영어(와 일부 관련 언어)용으로 보정되었습니다. 한국어의 결과는 신뢰할 수 없습니다.
Flesch Reading Ease was developed by Rudolf Flesch in 1948 to measure how easy a piece of English text is to read.
The formula rewards short sentences and short words. Higher scores (90+) mean text a fifth-grader can read; very low scores (under 30) indicate academic prose.
It does not measure correctness, persuasiveness, or quality — only mechanical readability.
For general audiences aim for 60–70. Web copy and marketing often target 70+ for maximum reach. Academic writing typically scores 30–50.
The formula is 206.835 − 1.015 × (words/sentences) − 84.6 × (syllables/words). Lower numbers mean harder text.
No. The constants were calibrated on English. Use LIX or Coleman-Liau for European languages and treat results as approximate.
Only indirectly: longer words tend to have more syllables. For vocabulary-aware scoring use Dale-Chall.
U.S. grade level for your text.
readabilityPenalises complex (3+ syllable) words.
readabilityHealth & medical text grade level.
readabilityNo syllables needed — just characters.