IGCSE Biology grade boundaries — June 2025
Cambridge IGCSE (CAIE) (0610). Minimum raw marks for each grade in the June 2025 series, by tier and paper combination. Pick the option matching the papers you sat.
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.