SUS calculator
System Usability Scale — usability score from 10 items (0–100)
SUS (System Usability Scale) — standardized usability score from 10 items. Score 0–100; higher is better usability.
Enter survey data
Rate from 1 (strongly disagree) to 5 (strongly agree)
Assumptions and limitations
- SUS was developed by John Brooke in 1986.
- Odd items are positive, even items are negative.
- The formula inverts even-item scores.
SUS score
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FAQ about SUS
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