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Table 1 The Flesch Kincaid Grade Level formula and the interpretation of the test

From: Readability levels and thematic content analysis of online and printed lead poisoning informational materials

 

Formula

Interpretation

FKGL

0.39 (total words/total sentences) + 11.8 (total syllables/total words) – 15.59

5: Very easy to read (5th grade)

6: Easy (6th grade)

8: Standard (8th grade)

10: Fairly difficult (10-12th grade)

12–14: Difficult (College level)

> 14: Very difficult (College graduates)