Flesch Reading Ease Calculator
Flesch Reading Ease score for a pasted text, with the readability band and the working shown.
What is Flesch Reading Ease?
Flesch Reading Ease is the original readability formula and still the most widely quoted: a score between 0 and about 120 where higher is easier. It works from two measurements — average sentence length in words and average syllables per word — and is calibrated so that 60–70 reads as plain English, the level a general newspaper aims at, while 30 and below is university-level prose. It is unusual among readability measures in that a high number is a good thing, so the scale direction is worth stating every time the score appears.
How it works
The score is 206.835 minus 1.015 times the average sentence length minus 84.6 times the average syllables per word, computed from the category's shared statistics: sentences split with decimals, abbreviations and initials masked, syllables counted by vowel group with a silent-e and a consonant-le rule. Because a syllable is weighted about eighty times a word, the vocabulary term dominates — a long sentence of short words scores better than a short sentence of long ones. The formula is printed with this text's numbers substituted, the counted inputs are shown beside it, and all five formulas are run on the same numbers so the spread between them is visible.
- Enter your input. Type or paste your input into the field above — the tool responds instantly.
- Review the result. Output updates live as you type. Everything runs entirely in your browser.
- Copy or download. Use the Copy button to grab the result, or Download to save it as a file.
Examples
Realistic sample
Type or paste any realistic input — the tool computes the result locally and instantly.
Common mistakes
Expecting a server round-trip
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