Enter the average number of letters per 100 words and the average number of sentences per 100 words into the Coleman-Liau Index Calculator. The calculator will evaluate the Coleman-Liau Index.

## Coleman-Liau Index Formula

The following two example problems outline the steps and information needed to calculate the Coleman-Liau Index.

CLI = 0.0588*L - 0.296*S - 15.8

Variables:

- CLI is the Coleman-Liau Index ( )
- L is the average number of letters per 100 words
- S is the average number of sentences per 100 words

## How to Calculate Coleman-Liau Index?

The following steps outline how to calculate the Coleman-Liau Index.

- First, determine the average number of letters per 100 words.
- Next, determine the average number of sentences per 100 words.
- Next, gather the formula from above = CLI = 0.0588*L – 0.296*S – 15.8.
- Finally, calculate the Coleman-Liau Index.
- After inserting the variables and calculating the result, check your answer with the calculator above.

**Example Problem : **

Use the following variables as an example problem to test your knowledge.

average number of letters per 100 words = 600

average number of sentences per 100 words = 10

CLI = 0.0588*L – 0.296*S – 15.8** **= ?