Flesch Reading Ease, developed by Rudolph Flesch in 1948, is a readability test. The score on the test will tell you roughly what level of education someone will need to be able to read a piece of text easily.
The Flesch Reading Ease formula generates a score usually between 0 and 100 (although it is possible to generate scores below and above this banding). A higher score means text is more readable, and a lower score means the text is less readable. This is opposite to the way most readability algorithms work, where they produce a grade level and a higher score means worse readability.
A Flesch Reading Ease score of 70-80 is equivalent to school grade level 7 and should be fairly easy for the average adult to read.
For more information, please read our blog: The Flesch Reading Ease and Flesch-Kincaid Grade Level.