Free Flesch-Kincaid Calculator
Paste any passage to calculate Flesch Reading Ease and Flesch-Kincaid Grade Level scores instantly, with word, sentence, and syllable counts.
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Paste a passage and click Calculate to see both readability scores plus the counts that drive them.
Reading Ease score guide
| Score | Difficulty | Typical audience |
|---|---|---|
| 90-100 | Very easy | 5th grade or earlier |
| 80-89 | Easy | 6th grade |
| 70-79 | Fairly easy | 7th grade |
| 60-69 | Standard | 8th to 9th grade |
| 50-59 | Fairly difficult | 10th to 12th grade |
| 30-49 | Difficult | College |
| 0-29 | Very confusing | College graduate |
Formulas used
Flesch Reading Ease:Reading Ease = 206.835 - 1.015 x (words / sentences) - 84.6 x (syllables / words)
Flesch-Kincaid Grade Level:Grade Level = 0.39 x (words / sentences) + 11.8 x (syllables / words) - 15.59
Readability tools can vary slightly because syllable counting and sentence splitting are heuristic. Use the score as a strong estimate, not a strict rule.