SMOG Index Calculator
Calculate the SMOG (Simple Measure of Gobbledygook) Index for text readability assessment.
SMOG Analysis
0 sentences, 0 polysyllabic words
SMOG Formula
SMOG Grade = 1.0430 x sqrt(Polysyllables x 30/Sentences) + 3.1291
SMOG is considered highly accurate for health literacy and is recommended by the U.S. Department of Health and Human Services.
What is a Polysyllable?
A polysyllabic word has 3 or more syllables. Examples: education (4), beautiful (3), understanding (4), impossible (4).
SMOG Index
0
Enter at least 30 sentences for accurate results
Target Audience
N/A
Why Use SMOG?
SMOG is particularly reliable for health education materials. It was developed by G. Harry McLaughlin in 1969 and is considered one of the most accurate readability formulas. For health materials, aim for SMOG grade 6-8.
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Editorial Note
MyCalcBuddy Editorial Team
This page is maintained as an educational calculator reference.
Formula Source: Standard Mathematical References
by Various