Readability Score Checker
Check Flesch-Kincaid, Gunning Fog, SMOG, Coleman-Liau, and ARI readability scores of any text — free, instant, no signup.
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Frequently asked questions
What is the Flesch Reading Ease score?
Flesch Reading Ease ranges from 0 (very confusing) to 100 (very easy). A score of 60–70 suits most general audiences, while scores above 80 are suitable for 6th-grade readers. Scores below 30 are considered professional or academic level.
What is a good Flesch-Kincaid grade level?
The Flesch-Kincaid Grade Level maps your text to a US school grade. Grade 8 (eighth grade) is considered the standard reading level for everyday content. Most major newspapers target grades 6–8.
How is the Gunning Fog Index calculated?
Gunning Fog = 0.4 × (average sentence length + percentage of complex words). Complex words have three or more syllables. A score under 12 is accessible to most readers; above 17 is college-graduate level.
Which readability formula should I use?
Use Flesch Reading Ease for a quick audience-fit check, Flesch-Kincaid Grade for US education alignment, Gunning Fog or SMOG for healthcare or technical writing, and ARI or Coleman-Liau for automated content pipelines. Comparing multiple scores gives the most reliable picture.