> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://help.readable.com/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# What readability algorithms do you use?

Readable is the most comprehensive readability tool. 

Readable currently uses:

### Grade Levels
Flesch-Kincaid
Gunning Fog
Coleman Liau
SMOG
Automated Readability Index
FORCAST
Powers Sumner Kearl
Rix

### Graphs
Raygor Readability Graph
Fry Readability Graph

### Scores
Flesch Reading Ease
CEFR
IELTS
Spache
Dale-Chall
Lix 
Lensear Write

New scores are regularly added.