Readability Checker
Readability formulas estimate how hard a text is to read from sentence length and word length. Pick the formula that matches your language: Flesch Reading Ease for English (with the Flesch–Kincaid grade level), Fernández Huerta for Spanish and other Romance languages, or the Wiener Sachtextformel for German, which returns a school grade level instead of a 0–100 score. The right formula is preselected from your language.
Frequently asked questions
What does the Flesch Reading Ease score mean?
It ranges from 0 to 100 — higher is easier. Roughly: 90+ very easy, 60–70 plain language most adults read comfortably, 30–50 difficult (college level), below 30 very difficult academic prose.
Why are there different formulas for different languages?
Word and sentence lengths differ systematically between languages — Spanish words carry more syllables than English ones, German compounds are long — so English constants would misjudge other languages. Fernández Huerta adapts Flesch to Spanish, and the Wiener Sachtextformel was built for German non-fiction.
What score should I aim for?
For general audiences aim for a Flesch score of 60 or higher (or a Wiener grade of 9 or lower). News writing typically scores 50–70; legal and academic texts often fall below 30, which is fine for expert readers but hard for everyone else.