IGCSE Biology (0610) grade boundaries — June 2025
Cambridge IGCSE (CAIE) (0610). 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 Biology required 159/200 (80%) on extended · papers 21, 41, 51.
- That A* threshold is 3 marks lower than March 2025 — slightly easier to achieve.
- Across paper variants, the A* boundary ranged from 156 to 174 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* | 159 | 80% |
| A | 131 | 66% |
| B | 103 | 52% |
| C | 75 | 38% |
| D | 65 | 33% |
| E | 56 | 29% |
| F | 47 | 24% |
| G | 38 | 19% |
Maximum mark: 200.
Extended · Papers 22, 42, 52
| Grade | Min mark | Min % |
|---|---|---|
| A* | 173 | 87% |
| A | 148 | 74% |
| B | 123 | 62% |
| C | 99 | 50% |
| D | 85 | 43% |
| E | 71 | 36% |
| F | 58 | 29% |
| G | 45 | 23% |
Maximum mark: 200.
Extended · Papers 23, 43, 53
| Grade | Min mark | Min % |
|---|---|---|
| A* | 156 | 78% |
| A | 131 | 66% |
| B | 106 | 53% |
| C | 81 | 41% |
| D | 69 | 35% |
| E | 58 | 29% |
| F | 48 | 24% |
| G | 38 | 19% |
Maximum mark: 200.
Extended · Papers 21, 41, 61
| Grade | Min mark | Min % |
|---|---|---|
| A* | 160 | 80% |
| A | 132 | 66% |
| B | 104 | 52% |
| C | 76 | 38% |
| D | 66 | 33% |
| E | 56 | 29% |
| F | 48 | 24% |
| G | 40 | 20% |
Maximum mark: 200.
Extended · Papers 22, 42, 62
| Grade | Min mark | Min % |
|---|---|---|
| A* | 174 | 87% |
| A | 149 | 75% |
| B | 124 | 62% |
| C | 99 | 50% |
| D | 85 | 43% |
| E | 71 | 36% |
| F | 58 | 29% |
| G | 45 | 23% |
Maximum mark: 200.
Extended · Papers 23, 43, 63
| Grade | Min mark | Min % |
|---|---|---|
| A* | 157 | 79% |
| A | 132 | 66% |
| B | 107 | 54% |
| C | 82 | 41% |
| D | 70 | 35% |
| E | 59 | 30% |
| F | 49 | 25% |
| G | 39 | 20% |
Maximum mark: 200.
Core · Papers 11, 31, 51
| Grade | Min mark | Min % |
|---|---|---|
| C | 117 | 59% |
| D | 101 | 51% |
| E | 85 | 43% |
| F | 69 | 35% |
| G | 53 | 27% |
Maximum mark: 200.
Core · Papers 12, 32, 52
| Grade | Min mark | Min % |
|---|---|---|
| C | 113 | 57% |
| D | 99 | 50% |
| E | 85 | 43% |
| F | 72 | 36% |
| G | 59 | 30% |
Maximum mark: 200.
Core · Papers 13, 33, 53
| Grade | Min mark | Min % |
|---|---|---|
| C | 112 | 57% |
| D | 99 | 50% |
| E | 87 | 44% |
| F | 75 | 38% |
| G | 63 | 32% |
Maximum mark: 200.
Core · Papers 11, 31, 61
| Grade | Min mark | Min % |
|---|---|---|
| C | 118 | 59% |
| D | 101 | 51% |
| E | 85 | 43% |
| F | 70 | 35% |
| G | 55 | 28% |
Maximum mark: 200.
Core · Papers 12, 32, 62
| Grade | Min mark | Min % |
|---|---|---|
| C | 113 | 57% |
| D | 99 | 50% |
| E | 85 | 43% |
| F | 72 | 36% |
| G | 59 | 30% |
Maximum mark: 200.
Core · Papers 13, 33, 63
| Grade | Min mark | Min % |
|---|---|---|
| C | 113 | 57% |
| D | 100 | 50% |
| E | 88 | 44% |
| F | 76 | 38% |
| G | 64 | 32% |
Maximum mark: 200.
Calculate your Biology grade →
Figures sourced from the official Cambridge grade threshold tables. Always confirm with your exam board.