IGCSE Combined Science (0653) grade boundaries — June 2025
Cambridge IGCSE (CAIE) (0653). The official grade thresholds for the June 2025 series — the minimum raw mark needed for each grade, by tier and paper combination. Pick the option matching the papers you sat.
Cambridge publishes these as grade threshold tables: "grade thresholds" and "grade boundaries" are two names for the same numbers.
June 2025 at a glance
- A A* in Combined Science required 144/200 (72%) on extended · papers 21, 41, 51.
- That A* threshold is 10 marks lower than March 2025 — slightly easier to achieve.
- Across paper variants, the A* boundary ranged from 144 to 146 marks — variant choice mattered this session.
- A grade C needed roughly 38% on extended · papers 21, 41, 51.
Extended · Papers 21, 41, 51
| Grade | Min mark | Min % |
|---|---|---|
| A* | 144 | 72% |
| A | 121 | 61% |
| B | 98 | 49% |
| C | 76 | 38% |
| D | 65 | 33% |
| E | 55 | 28% |
| F | 45 | 23% |
| G | 35 | 18% |
Maximum mark: 200.
Extended · Papers 22, 42, 52
| Grade | Min mark | Min % |
|---|---|---|
| A* | 146 | 73% |
| A | 122 | 61% |
| B | 98 | 49% |
| C | 75 | 38% |
| D | 64 | 32% |
| E | 54 | 27% |
| F | 44 | 22% |
| G | 34 | 17% |
Maximum mark: 200.
Extended · Papers 21, 41, 61
| Grade | Min mark | Min % |
|---|---|---|
| A* | 144 | 72% |
| A | 121 | 61% |
| B | 98 | 49% |
| C | 76 | 38% |
| D | 65 | 33% |
| E | 55 | 28% |
| F | 45 | 23% |
| G | 35 | 18% |
Maximum mark: 200.
Extended · Papers 22, 42, 62
| Grade | Min mark | Min % |
|---|---|---|
| A* | 146 | 73% |
| A | 122 | 61% |
| B | 98 | 49% |
| C | 75 | 38% |
| D | 64 | 32% |
| E | 54 | 27% |
| F | 44 | 22% |
| G | 34 | 17% |
Maximum mark: 200.
Extended · Papers 23, 43, 63
| Grade | Min mark | Min % |
|---|---|---|
| A* | 145 | 73% |
| A | 121 | 61% |
| B | 97 | 49% |
| C | 74 | 37% |
| D | 63 | 32% |
| E | 53 | 27% |
| F | 44 | 22% |
| G | 35 | 18% |
Maximum mark: 200.
Core · Papers 11, 31, 51
| Grade | Min mark | Min % |
|---|---|---|
| C | 87 | 44% |
| D | 73 | 37% |
| E | 60 | 30% |
| F | 48 | 24% |
| G | 36 | 18% |
Maximum mark: 200.
Core · Papers 12, 32, 52
| Grade | Min mark | Min % |
|---|---|---|
| C | 87 | 44% |
| D | 73 | 37% |
| E | 60 | 30% |
| F | 47 | 24% |
| G | 34 | 17% |
Maximum mark: 200.
Core · Papers 11, 31, 61
| Grade | Min mark | Min % |
|---|---|---|
| C | 87 | 44% |
| D | 73 | 37% |
| E | 60 | 30% |
| F | 48 | 24% |
| G | 36 | 18% |
Maximum mark: 200.
Core · Papers 12, 32, 62
| Grade | Min mark | Min % |
|---|---|---|
| C | 87 | 44% |
| D | 73 | 37% |
| E | 60 | 30% |
| F | 47 | 24% |
| G | 34 | 17% |
Maximum mark: 200.
Core · Papers 13, 33, 63
| Grade | Min mark | Min % |
|---|---|---|
| C | 86 | 43% |
| D | 72 | 36% |
| E | 59 | 30% |
| F | 47 | 24% |
| G | 35 | 18% |
Maximum mark: 200.
Calculate your Combined Science grade →
Figures sourced from the official Cambridge grade threshold tables. Always confirm with your exam board.