Itqualityassurance
Interpreting System Usability Scale (SUS) Score
| SUS Score | Grade | Adjective Rating |
|---|---|---|
| > 80.3 | A | Excellent |
| 68 – 80.3 | B | Good |
| 68 | C | Okay |
| 51 – 68 | D | Poor |
What is the SUS number?
The SUS rating is a number from 0 to 100. The higher the SUS of your site, the easier it is to use. The SUS is derived from a 10-item questionnaire that users answer after completing a test. The answers are on a scale of 1 to 5, where one means that they disagree completely and five that they fully agree.
