Readability Score
Score text with Flesch reading ease, Flesch-Kincaid grade, SMOG and Gunning fog, and see which sentences are hardest to read. Calculated as you type.
Sentence highlights
Readability formulas estimate how hard a passage is to read. They count sentences, words and syllables. Short sentences with familiar words score well. Notwithstanding the considerable methodological limitations inherent in syllable-counting heuristics, these approximations nevertheless provide remarkably serviceable indications of comparative textual complexity for most contemporary audiences.
Hardest sentences
- Grade 31.1 · 24 words — Notwithstanding the considerable methodological limitations inherent in syllable-counting heuristics, these approximations nevertheless provide remarkably serviceable indications of comparative textual complexity for most contemporary audiences.
- Grade 10.7 · 10 words — Readability formulas estimate how hard a passage is to read.
- Grade 4.5 · 6 words — They count sentences, words and syllables.
- Grade 4.0 · 7 words — Short sentences with familiar words score well.
How to use Readability Score
- 1Open Readability Score. It runs in your browser, no sign-up.
- 2Type or paste your input.
- 3Copy or download the result.
Questions
Which score should I use?
Flesch-Kincaid is the most widely used. SMOG is preferred for health information. Gunning fog penalises long, complex words. All three estimate the US school grade needed to understand the text.
What grade should I aim for?
Grade 7–9 suits most public writing. Plain-language guidance for government and health content often targets grade 6–8.
How are sentences highlighted?
Each sentence gets its own Flesch-Kincaid grade. Green is at or below your target, yellow is up to four grades above, red is harder.
Is my text sent anywhere?
No. Scores are calculated in your browser as you type.