Score SUS Without Turning It Into a Vibe

After a beta, the team asks whether the admin console is "usable enough." You have 28 SUS responses, but the spreadsheet contains raw 1-5 scores and three comments saying "pretty good." If you average the raw scores, the number will be wrong. SUS scoring: adjust odd items, reverse even items, multiply by 2.5, interpret as a benchmark not a percent. Calling SUS a percentage makes stakeholders think 71 means "71% usable," which is not how the scale works. Step 1 For odd-numbered items, subtract 1 from the response. Positive SUS items contribute more when the respondent agrees. Step 2 For…

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