ClickHelp User Manual

Flesch-Kincaid Grade Level

The Flesch-Kincaid Grade Level is a readability metric used to determine how difficult a text is to understand based on the length of words and sentences in the text. The values vary from 0 to 18, where 18 represents the most difficult text. Here's how the grade level should be interpreted:

Value School level Student age range Notes
0-1 Pre-kindergarten - 1st grade 3-7 Basic level for those who just learn to read books.
1-5 1st grade - 5th grade 7-11 Very easy to read.
5-11 5th grade - 11th grade 11-17 Average level. Good for the majority of marketing materials. 
11-18 11th grade - 18th grade 17 and above The text is for skilled readers. For example, an academic paper.

A grade level of 8 (13- to 15-year-old students) is recommended for English content to be successfully read by 80% of readers in the USA. The level for marketing materials may vary from grade level 6 to 15, where lower levels are okay for short blog posts or emails, and higher levels can be used for ebooks.

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Since it's based on the American Education system, school levels and age ranges may be inaccurate for non-English languages. However, it's still possible to compare the relative readability of two topics written in the same language.

If a metric value is zero, make sure that the project language matches the content language and check the punctuation.

Check out the other readeability metrics: