Flesch Reading Ease Score Calculator

Calculate Flesch Reading Ease Score



Formula

To calculate the Flesch Reading Ease Score (\(FRES\)):

\[ FRES = 206.835 - (1.015 \cdot ASL) - (84.6 \cdot ASW) \]

Where:

What is the Flesch Index?

The Flesch Index, also known as the Flesch Reading Ease Score, is a tool used to assess the readability of an English text. It uses a mathematical formula to calculate a score based on the average number of syllables per word and the average number of words per sentence. The resulting score ranges from 0 to 100, with a higher score indicating easier readability. This index is commonly used in the fields of education and journalism to ensure written materials are appropriate for the intended audience’s reading ability.

Example Calculation 1

Let's assume the following values:

Using the formula:

\[ FRES = 206.835 - (1.015 \cdot 15) - (84.6 \cdot 1.5) = 206.835 - 15.225 - 126.9 = 64.71 \]

The Flesch Reading Ease Score is 64.71.

Example Calculation 2

Let's assume the following values:

Using the formula:

\[ FRES = 206.835 - (1.015 \cdot 20) - (84.6 \cdot 1.2) = 206.835 - 20.3 - 101.52 = 85.02 \]

The Flesch Reading Ease Score is 85.02.