Grade boundaries
Cambridge Cambridge O Level Science - Combined 5129 grade boundaries June 2025
The least raw mark that reached each grade in June 2025, as Cambridge printed it, for the whole subject and each paper.
From Cambridge’s grade boundaries for June 2025: the board’s document.
| Grade | Whole subject (11, 21, 31)out of 200 | Whole subject (12, 22, 32)out of 200 | 5129/11out of 40 | 5129/12out of 40 | 5129/21out of 80 | 5129/22out of 80 | 5129/31out of 40 | 5129/32out of 40 |
|---|---|---|---|---|---|---|---|---|
| A* | 156 | 155 | – | – | – | – | – | – |
| A | 133 | 132 | 28 | 28 | 50 | 50 | 28 | 27 |
| B | 110 | 109 | 25 | 25 | 40 | 40 | 23 | 22 |
| C | 87 | 86 | 21 | 21 | 30 | 30 | 18 | 17 |
| D | 73 | 72 | 19 | 19 | 24 | 24 | 14 | 13 |
| E | 59 | 58 | 16 | 16 | 19 | 19 | 11 | 10 |
Marks for each grade
In total (11, 21, 31)
- 156 out of 200 on Cambridge 5129 (11, 21, 31) in total was a grade A* in June 2025.
- 133 out of 200 on Cambridge 5129 (11, 21, 31) in total was a grade A in June 2025.
- 110 out of 200 on Cambridge 5129 (11, 21, 31) in total was a grade B in June 2025.
- 87 out of 200 on Cambridge 5129 (11, 21, 31) in total was a grade C in June 2025.
- 73 out of 200 on Cambridge 5129 (11, 21, 31) in total was a grade D in June 2025.
- 59 out of 200 on Cambridge 5129 (11, 21, 31) in total was a grade E in June 2025.
In total (12, 22, 32)
- 155 out of 200 on Cambridge 5129 (12, 22, 32) in total was a grade A* in June 2025.
- 132 out of 200 on Cambridge 5129 (12, 22, 32) in total was a grade A in June 2025.
- 109 out of 200 on Cambridge 5129 (12, 22, 32) in total was a grade B in June 2025.
- 86 out of 200 on Cambridge 5129 (12, 22, 32) in total was a grade C in June 2025.
- 72 out of 200 on Cambridge 5129 (12, 22, 32) in total was a grade D in June 2025.
- 58 out of 200 on Cambridge 5129 (12, 22, 32) in total was a grade E in June 2025.
Paper 5129/11
- 28 out of 40 on Cambridge 5129 paper 5129/11 was a grade A in June 2025.
- 25 out of 40 on Cambridge 5129 paper 5129/11 was a grade B in June 2025.
- 21 out of 40 on Cambridge 5129 paper 5129/11 was a grade C in June 2025.
- 19 out of 40 on Cambridge 5129 paper 5129/11 was a grade D in June 2025.
- 16 out of 40 on Cambridge 5129 paper 5129/11 was a grade E in June 2025.
Paper 5129/12
- 28 out of 40 on Cambridge 5129 paper 5129/12 was a grade A in June 2025.
- 25 out of 40 on Cambridge 5129 paper 5129/12 was a grade B in June 2025.
- 21 out of 40 on Cambridge 5129 paper 5129/12 was a grade C in June 2025.
- 19 out of 40 on Cambridge 5129 paper 5129/12 was a grade D in June 2025.
- 16 out of 40 on Cambridge 5129 paper 5129/12 was a grade E in June 2025.
Paper 5129/21
- 50 out of 80 on Cambridge 5129 paper 5129/21 was a grade A in June 2025.
- 40 out of 80 on Cambridge 5129 paper 5129/21 was a grade B in June 2025.
- 30 out of 80 on Cambridge 5129 paper 5129/21 was a grade C in June 2025.
- 24 out of 80 on Cambridge 5129 paper 5129/21 was a grade D in June 2025.
- 19 out of 80 on Cambridge 5129 paper 5129/21 was a grade E in June 2025.
Paper 5129/22
- 50 out of 80 on Cambridge 5129 paper 5129/22 was a grade A in June 2025.
- 40 out of 80 on Cambridge 5129 paper 5129/22 was a grade B in June 2025.
- 30 out of 80 on Cambridge 5129 paper 5129/22 was a grade C in June 2025.
- 24 out of 80 on Cambridge 5129 paper 5129/22 was a grade D in June 2025.
- 19 out of 80 on Cambridge 5129 paper 5129/22 was a grade E in June 2025.
Paper 5129/31
- 28 out of 40 on Cambridge 5129 paper 5129/31 was a grade A in June 2025.
- 23 out of 40 on Cambridge 5129 paper 5129/31 was a grade B in June 2025.
- 18 out of 40 on Cambridge 5129 paper 5129/31 was a grade C in June 2025.
- 14 out of 40 on Cambridge 5129 paper 5129/31 was a grade D in June 2025.
- 11 out of 40 on Cambridge 5129 paper 5129/31 was a grade E in June 2025.
Paper 5129/32
- 27 out of 40 on Cambridge 5129 paper 5129/32 was a grade A in June 2025.
- 22 out of 40 on Cambridge 5129 paper 5129/32 was a grade B in June 2025.
- 17 out of 40 on Cambridge 5129 paper 5129/32 was a grade C in June 2025.
- 13 out of 40 on Cambridge 5129 paper 5129/32 was a grade D in June 2025.
- 10 out of 40 on Cambridge 5129 paper 5129/32 was a grade E in June 2025.