SMOG Index

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The SMOG Index is the approximate version of SMOG (Simple Measure Of Gobbledygook), making this readability test easy to calculate manually. SMOG can be calculated more accurately using the instant free online SMOG Calculator. The output estimates the number of years of U.S. education needed to fully comprehend the text.

[edit] Formula

To calculate the SMOG Index:

1. Count the number of complex words (words containing 3 or more syllables).
2. Multiply the number of complex words by a factor of (30/number of sentences).
3. Take the square root of the resultant number.
4. Add 3 to the resultant number.

[edit] External links

• Online readability tests - finds SMOG and other indices, suggestions how to improve readability

[edit] See also

• Gunning-Fog Index
• Flesch-Kincaid Readability Test
• Automated Readability Index
• Coleman-Liau Index
• Readability
• Readability Test