IGCSE Human Biology (4HB1) grade boundaries — June 2025
Edexcel International GCSE (Pearson) (4HB1). 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.
Edexcel publishes these as grade threshold tables: "grade thresholds" and "grade boundaries" are two names for the same numbers.
June 2025 at a glance
- A 9 in Human Biology required 152/180 (85%) on overall (9–1).
- That 9 threshold is unchanged from June 2024.
- Across paper variants, the 9 boundary ranged from 152 to 156 marks — variant choice mattered this session.
- A grade 4 needed roughly 48% on overall (9–1).
Overall (9–1)
| Grade | Min mark | Min % |
|---|---|---|
| 9 | 152 | 85% |
| 8 | 139 | 78% |
| 7 | 127 | 71% |
| 6 | 113 | 63% |
| 5 | 99 | 56% |
| 4 | 85 | 48% |
| 3 | 66 | 37% |
| 2 | 47 | 27% |
| 1 | 28 | 16% |
Maximum mark: 180.
Overall · variant 2 (9–1)
| Grade | Min mark | Min % |
|---|---|---|
| 9 | 156 | 87% |
| 8 | 143 | 80% |
| 7 | 131 | 73% |
| 6 | 117 | 65% |
| 5 | 103 | 58% |
| 4 | 89 | 50% |
| 3 | 70 | 39% |
| 2 | 51 | 29% |
| 1 | 32 | 18% |
Maximum mark: 180.
Calculate your Human Biology grade →
Figures sourced from the official Edexcel grade threshold tables. Always confirm with your exam board.