Flesch Grade Level Readability Formula improves upon the

Flesch Reading Ease
Readability Formula.

**Rudolph Flesch**, an author, writing consultant, and the supporter of Plain English Movement, is the co-author of this formula along with

**John P. Kincaid**. That’s why it is also called

*Flesch-Kincaid Grade Level Readability Test*. Raised in Austria, Flesch studied law and earned a Ph.D. in English from the Columbia University. Flesch, through his writings and speeches, advocated a return to phonics. In his article,

*A New Readability Yardstick*, published in the

*Journal of Applied Psychology* in 1948, Flesch proposed the

**Reading Ease Readability
Formula**.

In 1976 the US Navy modified the Reading Ease formula to produce a grade-level score by applying the Flesch Grade-Scale formula, or the Kincaid formula. John P. Kincaid was assisted by Fishburne, Rogers, and Chissom, in his research.

This formula is known by different names, like Flesch-Kincaid Index, Flesch-Kincaid Grade Level Score, Flesch-Kincaid Scale, Flesch-Kincaid Score, Flesch-Kincaid Readability Score, Flesch-Kincaid Readability Statistics, Flesch-Kincaid Grade Level Index, Flesch-Kincaid Readability
Index, Flesch-Kincaid readability equation, and so on.

Originally formulated for US Navy purposes, this Formula is best suited in the field of education.