Once participants complete your study, you'll see the results of your System Usability Scale (SUS) block, including:

The headline of your results is a single score from 0 to 100 that sums up how usable participants found the experience. Beside it are three readouts that tell you what the score means: a grade, an adjective rating and an acceptability verdict. Hover over any of them to see the full set of ranges.

Askable uses the standard SUS scoring method, so your score can be compared directly with published SUS benchmarks.

Each answer is first given a value from 1 (Strongly disagree) to 5 (Strongly agree). Because the statements alternate between positive and negative wording, they're scored in opposite directions:

That gives every statement a contribution from 0 to 4. The ten contributions are added together (0–40) and multiplied by 2.5 to give that participant's score out of 100.

The overall score for the block is the average of every participant's individual score. Only participants who answered all ten statements are included, because a missing answer can't be treated as neutral. The score is shown to one decimal place.

A participant answers Agree (4) to every positive statement and Disagree (2) to every negative statement. Each positive statement contributes 4 − 1 = 3, and each negative statement contributes 5 − 2 = 3. That's 10 × 3 = 30, and 30 × 2.5 gives a score of 75.0, which is a B.

It's tempting to read 70 out of 100 as "70%", but SUS scores don't work that way. Across hundreds of published studies the average score is around 68, which sits in the middle of a C. That's why Askable interprets your score against a curved grading scale rather than as a percentage.

The grade shows where your score sits on the industry-standard curved grading scale published by Sauro and Lewis. The bands are deliberately uneven because they're based on how scores are actually distributed across real studies.

The adjective is a plain-English label for the score. It's taken from the same curve as the grade, so the two always agree. An average product reads as "Fair", and "Excellent" starts where an A starts.

Acceptability tells you whether usability at this level is generally considered acceptable. Again, it's taken from the same curve: anything below a D is not acceptable, and C+ and above is acceptable.

If no participant has answered all ten statements yet, you'll see "No complete responses yet" in place of the score.

This horizontal bar chart shows the average rating for each of the ten statements, from 1 (Strongly disagree) to 5 (Strongly agree). Unlike Matrix, statements are shown in the order participants saw them rather than ranked by score, so you can always find statement 1 at the top and statement 10 at the bottom.

These averages are useful for spotting which aspects of usability are pulling your score up or down. The overall SUS score itself is calculated per participant, as described above, not from these averages.

This table shows how participants rated each statement across the five-point scale, from Strongly disagree through to Strongly agree, along with a weighted average for each statement. You can toggle between percentage (%) and count (#) views using the buttons in the top-right corner of the table.

Below the summary charts, you'll find a table showing how each participant rated every statement. This includes their selected answer for each statement, how long they spent on the question, and when they completed it.

If you've added a SUS block to each variant in a Variant Comparison, you can create a results comparison to see the overall SUS score for each variant side by side. Each score is calculated in exactly the same way as above, using only the participants who completed that variant.

The comparison shows the score only. To see a variant's grade, adjective, acceptability and statement-by-statement breakdown, open that variant's SUS block from the block list. If no one in a variant has answered all ten statements yet, you'll see "No complete responses yet" instead of a score.