Coleman-Liau Index Calculator
Calculate the Coleman-Liau Index to determine reading grade level based on letter and sentence counts.
Coleman-Liau Analysis
letters, words, sentences
Coleman-Liau Formula
CLI = 0.0588 x L - 0.296 x S - 15.8
Where L = average letters per 100 words, S = average sentences per 100 words
Formula Components
L (letters/100 words):
S (sentences/100 words):
Coleman-Liau Index
0
N/A
📚Grade Level
N/A
👤Age Range
Enter text to analyze
🔤Letters/Word
📝Words/Sentence
Readability
N/A - Suitable for ages Enter text to analyze
About Coleman-Liau Index
Developed by Meri Coleman and T.L. Liau in 1975, this index uses letter counts instead of syllables, making it computationally efficient. It was designed for machine calculation and is particularly useful for technical documents and academic texts.