Text Complexity Tools
More than 100 million articles, books and websites have Lexile text measures. However, as an educator, you may find you’d like to know the Lexile measures for additional text. With the Lexile Analyzer®, you can do just that.
Determine the reading level of a piece of text
Use the Lexile Analyzer to measure texts in English or Spanish.
The Lexile Analyzer
The Lexile Analyzer uses an algorithm to evaluate the reading demand — or text complexity — of books, articles and other materials. The Lexile Analyzer measures the complexity of the text by breaking down the entire piece and studying its characteristics, such as sentence length and word frequency, which represent the syntactic and semantic challenges that the text presents to a reader. The outcome is the text complexity, expressed as a Lexile measure, along with information on the word count, mean sentence length and mean log frequency.
Generally, longer sentences and words of lower frequency lead to higher Lexile measures; shorter sentences and words of higher frequency lead to lower Lexile measures. Texts such as lists, recipes, poetry and song lyrics are not analyzed because they lack conventional punctuation.
Spanish text can also receive Lexile measures. Simply select the “Spanish Analyzer” toggle in the top, right corner of the Analyzer to measure Spanish texts.