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Readability results
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Paste any English text to get its Flesch-Kincaid grade level, reading ease score, and Gunning Fog index, with plain-English interpretations.
Paste at least a few sentences for a meaningful score.
Results appear here.
Flesch Reading Ease rates text from 0 to 100, where higher is easier: most adult nonfiction aims for 60 to 70. Flesch-Kincaid Grade Level translates the same idea into a US school grade, so 8.0 means an eighth grader can follow it.
The Gunning Fog Index estimates years of formal schooling needed to understand the text on first reading. Business and web writing usually targets a Fog score under 12.
These formulas count sentence length and syllable density, which correlate well with reading difficulty but cannot judge clarity, jargon, or structure. Use them as a guide while editing, not as a final verdict on your writing.
Scores are most reliable on passages of at least 100 words; very short texts produce noisy results.