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.
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:
- Coleman-Liau Index
- Flesch Reading Ease
- Gunning Fog Index
- Automated Readability Index
- Linsear Write
- SMOG Index
- FORCAST Grade
- New Dale-Chall Score
- Average Grade