UsingEnglish.com

Gunning Fog Index Definition

Gunning Fog Index

Jump to: Definition | Related Entries |

The Gunning Fox index is the number of years of formal education that a person requires to easily comprehend the text on an initial reading.

Gunning Fog Index = 0.4 x (ASL + ((SYW / words) x 100))

Where:

ASL = Average sentence length (the number of words divided by the number of sentences)

SYW = Number of words with three or more syllables

For reference, the New York Times has an average Fog Index of 11-12, Time magazine about 11. Typically, technical documentation has a Fog Index between 10 and 15, and professional prose almost never exceeds 18.

See Also:

Check out our free Online Text Analyser to analyse readability scores, and much more.

Category:

Readability Tests

Related to 'Gunning Fog Index'


Trustpilot