icurio measures websites for readability on a point scale of 1 to 5, where 1 corresponds to low reading difficulty and 5 corresponds to high reading difficulty. icurio then prominently displays a score for each website, and even provides quick refinement options that allow you to click to websites of your desired readability level.

The relationship between grade levels and the icurio readability scores is given here:
| icurio Readability Score | ||||||
| Grade-Level Readability Equivalent |
1 - 3
|
4 - 6
|
7 - 8
|
9
- 10
|
11
- 13
|
See Below* |
The icurio readability score is a composite, an average of the scores generated by four long-standing readability formulas and the Lexile® Framework for Reading:
Additional readability scores generated by icurio are reported for comparison using these common devises for measuring readability:
The documentation for the style and diction program used by icurio to generate readability scores can be found at http://www.sunsite.ualberta.ca/Documentation/Gnu/diction-0.7/man/style.1.html.
To view all readability measures for a website, simply click on the View Content Details link. This button can be found on every web content result.

Occasionally icurio is unable to calculate a readability score for a website. Learn more here.