Usability Testing Sheet
System Usability Scale (SUS) Calculator & Tracker
Method: SUS (0-100 Scale)
Average SUS Score
0
Calculating...
Adjective Rating
-
Industry Avg: 68
Participants
0
Total Responses
Score Distribution (vs Benchmark)
Task Success Rate
Participant Logs
Individual SUS scores and task metrics calculated from raw questionnaire data.
| ID | Role/Segment | Raw Score (Q1-Q10) | Task Time (min) | Completion | SUS Score (0-100) | Grade |
|---|
How to Interpret SUS Scores
The System Usability Scale generates a score between 0 and 100. It is not a percentage, but a percentile ranking.
The "Curved" Grading Scale
Research maps SUS scores to letter grades as follows:
F (Unacceptable)
D
C
B
A (Excellent)
0
50
68 (Avg)
80
100
Acceptability Ranges
- < 50: Not Acceptable (Serious issues)
- 50 - 70: Marginal (Needs improvement)
- > 70: Acceptable
- > 85: Excellent (Promoter standard)
Data Entry
Enter a new participant's responses. The standard 10 SUS questions alternate between positive and negative tone.