Measure how easy your text is to read with the Flesch Reading Ease score and the Flesch-Kincaid grade level, plus word, sentence and syllable counts.
Readability measures how easy a text is to understand. The Flesch Reading Ease score goes from 0 to 100 — the higher, the easier. The Flesch-Kincaid grade level tells you the US school grade a reader needs to understand the text.
Both formulas use the same three ingredients: words, sentences and syllables. That is why this tool also shows each count separately.
Most websites aim for a grade level of 8 or lower so the widest audience can read them.
The analysis runs entirely in your browser. Your text is never sent to any server and never stored.
A number from 0 to 100 that estimates how easy a text is to read. Higher = easier: 90–100 is very easy (children's books), 60–70 is plain English (popular magazines), below 30 is very difficult (legal documents).
It converts the same word/sentence/syllable statistics into the US school grade needed to understand the text. Grade 8 means an average 13–14-year-old can read it. Most websites aim for 8 or lower.
By a standard approximation algorithm: each run of vowels counts as one syllable, with rules for silent e and common endings. It is very accurate for English but not perfect for every word.
A Flesch Reading Ease of 60–70 and a grade level of 8 or lower is the sweet spot for general audiences. Technical or academic content can intentionally target higher levels.
Indirectly. Google does not use Flesch scores directly, but easy-to-read text tends to keep visitors longer, which improves engagement signals. Clear, simple writing is a safe SEO investment.
Yes. Everything is analyzed locally in your browser. Nothing is uploaded, logged or stored — safe for drafts and private documents.