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Our live web text scoring software works with texts up to around 20,000 words. For larger texts, we recommend using our File processor, which can handle much larger documents.
If you want to check which words in a piece of text are not part of the Dale-Chall Word List, you're in the right place!
Paste your text in to the box on the left and click "Show Non-Dale-Chall Words". Any words not on the list will be highlighted in purple.
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What Are "Dale-Chall" Words?
The Dale-Chall readability formula uses a set of words which are familiar to students to calculate how readable a piece of text is. Those common words are a list of words with which 80% or more of fourth-grade students are familiar.
That word list has been modified over time, and the current version of the formula - the New Dale-Chall Readability Formula - uses about 3,000 words in its list.
You can find a full list of all Dale-Chall words here: The Dale-Chall Word List.