Flesch Reading Ease Definition

The Flesh Reading Ease formula is based on school texts covering grades three to twelve and is usually between 0 (hard) and 100 (easy).

Flesch Reading Ease Score = 206.835 - (1.015 x ASL) - (84.6 x ASW)


ASL = Average sentence length (the number of words divided by the number of sentences)

ASW = Average number of syllables per word (the number of syllables divided by the number of words)

The result is a number that corresponds to a numerical U.S. reading grade level.

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