Flesch Formula - Explained
What is the Flesch Formula?
Written by J. Mance Gordon
Updated at April 17th, 2024
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What is the Flesch Reading Ease Formula?
The Flesch Formula, also known as the Flesch Reading Ease Formula, is a formula used to gauge the difficulty or ease of reading and understanding a text. Two primary metrics in the formula are the number of sentences and syllables per 100 words in a passage. Based on historical results, it estimates the percentage of the US population capable of reading and understanding the text. In essence, short words and sentences are easier to read and understand than long ones.
How is the Flesch Reading Ease Formula Used?
The Flesch Formula provides a readability index score that ranges from 0 to 100. Higher scores indicate greater ease in readability and understanding. The generally scoring cutoffs are as follows:
- 100 = Extremely easy
- 65 = Relatively easy
- 30 = Difficult
- 0 = Extremely Difficult
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