Reading Level Analyzer
ARI is an approximate U.S. school-grade formula for English, not a reader assessment or a measure of meaning or quality. The interface supports six languages; scoring supports English only. Your passage stays in this browser.
ARI is an approximate U.S. school-grade formula for English, not a reader assessment or a measure of meaning or quality. The interface supports six languages; scoring supports English only. Your passage stays in this browser.
Formula and counting method
ARI = 4.71 × C/W + 0.5 × W/S − 21.43
C counts ASCII letters and digits. W counts alphanumeric groups with optional internal apostrophes. S counts nonempty word-containing chunks split by . ! ? or line breaks. Abbreviations, decimals, lists and unusual punctuation can distort the estimate. Scores are shown without clamping or rounding up to a school grade.
A QUICK WALKTHROUGH
How to use this tool
- Passage language
- Passage
- Analyze reading level
Formula and counting method
C counts ASCII letters and digits. W counts alphanumeric groups with optional internal apostrophes. S counts nonempty word-containing chunks split by . ! ? or line breaks. Abbreviations, decimals, lists and unusual punctuation can distort the estimate. Scores are shown without clamping or rounding up to a school grade. ARI = 4.71 × C/W + 0.5 × W/S − 21.43.
GOOD TO KNOW
Common questions
Passage language
No validated formula is provided here for this passage language. Select English only if the passage is English; no score has been calculated.