Readability Analyzer
Paste your training copy. Get Flesch Reading Ease, Flesch-Kincaid grade level, and Gunning Fog scores instantly. Most corporate training should land at grade 8–10.
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What the scores mean
Readability formulas estimate how hard a piece of writing is to read, expressed either as a US grade level or a 0–100 ease score. None of them are perfect — they measure surface features (sentence length, word length) and don't assess vocabulary appropriateness, subject difficulty, or structure. Use them as a sanity check, not a target.
Flesch Reading Ease (0–100)
Higher = easier. Above 70 reads at the level of a popular novel; 60–70 is plain English (the standard for corporate training); below 30 reads like academic or legal writing.
Flesch-Kincaid Grade Level
Translates Flesch Ease into US school grades. A score of 8.0 means a typical American 8th-grader can read it without struggle. Most corporate training should land between grade 8 and 10. Compliance training for general audiences should aim for grade 8 or below.
Gunning Fog
Years of formal education needed to understand a passage on first read. Calculated from sentence length plus the percentage of "complex words" (3+ syllables, with proper noun and common-suffix exceptions).
SMOG Index
Originally developed for healthcare materials. Uses the square root of polysyllabic word count, normalised to 30 sentences. Tends to score 1–2 grades higher than Flesch-Kincaid; healthcare guidelines often cite SMOG.
Limitations
All four formulas approximate syllable counts heuristically (no dictionary lookup), so technical jargon and proper nouns inflate scores. They also can't tell you if your ideas are clear — only that your sentences are short and your words are common.