Your grade journey
Cambridge AS Computer Sciencegrade boundaries
Explore official boundaries. See where your marks take you.
96185 official seriesMaximum mark 150
Exam series
Papers
Flight log / June 2026
Grade boundaries
OfficialPapers 11, 21 · Out of 150
Grade a
99
marks / 150
Grade b
85
marks / 150
Grade c
70
marks / 150
Grade d
56
marks / 150
All grade thresholds
| Grade | Minimum mark | Mark range | % of maximum |
|---|---|---|---|
| a | 99 | 99–150 | 66% |
| b | 85 | 85–98 | 57% |
| c | 70 | 70–84 | 47% |
| d | 56 | 56–69 | 37% |
| e | 42 | 42–55 | 28% |
| U | Below 42 | ||
These boundaries apply to this exam series and route.
How these boundaries have changed
Papers 11, 21, every official series. Boundaries move each year with how hard the papers were.
| Series | a | b | c | d | e |
|---|---|---|---|---|---|
| June 2026 | 99 | 85-1 | 70-1 | 56 | 42+1 |
| November 2025 | 95+3 | 78+1 | 62+1 | 47+1 | 32+1 |
| June 2025 | 99+5 | 86+6 | 71+4 | 56+2 | 41 |
| November 2024 | 92 | 77 | 61 | 46 | 31 |
| June 2024 | 94 | 80 | 67 | 54 | 41 |
+ higher than the same series a year earlier (harder to reach) · − lower (easier to reach).
Grade calculator
June 2026 · Papers 11, 21
Enter your mark for each paper to see your grade.
85 marks needed for Grade b.
Frequently asked questions
What was the boundary for a grade a in June 2026?
99 out of 150 on papers 11, 21; 99 out of 150 on papers 12, 22; 109 out of 150 on papers 13, 23 — the top grade for AS Computer Science in June 2026.
How is my grade worked out?
Your marks from each paper are added up (scaled by a weighting factor where papers count differently) to give your subject mark, which is then compared with the boundaries. Your grade comes from the total — not from each paper separately.
When will the next boundaries be published?
Cambridge publishes grade boundaries on results day for each series. Until then, any figures shown for a future series are Starley estimates, clearly labelled, based on recent years.