The Immediate ATOS Analyzer
Measuring Readability Level is Now Even Easier!
Guiding students to appropriate-level books is now much easier and more accurate than ever. ATOS is
the first formula to include statistics from actual student book-reading (over 30,000 students, reading
nearly 1,000,000 books), not just data based on short text passages.
Our ATOS readability formula was specifically designed to overcome many of the classic concerns around other formulas and is an outstanding tool for efficiently and effectively measuring key elements of text complexity. ATOS is specifically mentioned as a measure in Appendix A of CCSS for English Language Arts.
If you're looking to determine the ATOS readability level of a book or document that is not in our quiz store or
AR BookFinder, you're exactly where you need to be! Our new ATOS readability tool makes it easy to get the answers fast. First, just determine which option best suits the text document you want analyzed.
For more information, see these articles.
To get the most accurate ATOS analysis, use this option to submit the complete contents of a book.
Click here for instructions.
Submit Complete Book's TextEstimated Word Count
This option provides ATOS analysis using a sample of the book's text with an estimated word count.
Click here for instructions.
Submit Text with Estimated Word Count
This option works best for short stories, magazine and newspaper articles, test items, and other classroom materials.
Submit Text