Flesch-Kincaid Index

The Flesch-Kincaid Index is a modified version of the Flesch Reading Ease scale that converts the Reading Ease score to a grade-level equivalent. Results filtered using the Flesch-Kincaid Index readability measure are grade-level equivalents.

Formula:

Flesch-Kincaid = (AVSY*11.8) + (AVW*.39) – 15.59     where AVSY = the average number of syllables per word AVW = the average number of words in sentences