Readability Results Summary Value
Total sentences 320
Total words 3,994
Average words per Sentence 12.48
Words with 1 Syllable 2,706
Words with 2 Syllables 857
Words with 3 Syllables 332
Words with 4 or more Syllables 99
Percentage of word with three or more syllables 10.79%
Average Syllables per Word 1.46
Gunning Fog Index 9.31
Interpreting the Results
Philip Chalmers of Benefit from IT provided the following typical Fog Index scores, to help ascertain the readability of documents.
Typical Fog Index Scores Fog Index Resources
6: TV guides, The Bible, Mark Twain
8: Reader's Digest
8-10: Most popular novels
10: Time, Newsweek
11: Wall Street Journal
14: The Times, The Guardian
15-20: Academic papers
20-30: Only government sites can get away with this, because you can't ignore them.
30+: The government is covering something up
The following is the algorithm to determine the Gunning-Fog index.
Calculate the average number of words you use per sentence.
Calculate the percentage of difficult words in the sample (words with three or more syllables).
Add the totals together, and multiply the sum by 0.4.
Algorithm: (average_words_sentence + number_words_three_syllables_plus) * 0.4
The result is your Gunning-Fog index, which is a rough measure of how many years of schooling it would take someone to understand the content. The lower the number, the more understandable the content will be to your visitors. Results over seventeen are reported as seventeen, where seventeen is considered post-graduate level.
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