Automated Readability Index (ARI)

Results filtered using the ARI readability measure are grade-level equivalents. The ARI formula takes into account the number of words in a sentence, as well as the number of letters in each word.

Formula:

ARI = (4.71 x AVL) + (0.5 x AVW) – 21.43     where AVL = the average number of letters per word AVW = the average number of words in sentences