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Free Dale-Chall Calculator
How easy is your material to read? Add an English passage and calculate its Dale-Chall readability score.
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What is Dale-Chall readability?
Dale-Chall estimates the U.S. reading-grade band needed to understand English prose. It combines sentence length with the percentage of words outside the Dale-Chall list of familiar words.
Learn about readability metricsHow is the score calculated?
Score = 0.1579 x difficult word % + 0.0496 x (words / sentences)
When difficult words make up more than 5% of the passage, the formula adds 3.6365 to the score.
How should I use the result?
Readability evaluators offer a starting point. Your readers’ background knowledge, the subject, and the way you organize information also affect how easy a text is to understand.