IGCSE Human Biology (4HB1) grade boundaries — June 2026
Edexcel International GCSE (Pearson) (4HB1). The official grade thresholds for the June 2026 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 2026 at a glance
- A 9 in Human Biology required 156/180 (87%) on overall (9–1).
- That 9 threshold is 4 marks higher than June 2025 — slightly harder to achieve.
- Across paper variants, the 9 boundary ranged from 156 to 160 marks — variant choice mattered this session.
- A grade 4 needed roughly 50% on overall (9–1).
Overall (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 | 71 | 40% |
| 2 | 53 | 30% |
| 1 | 36 | 20% |
Maximum mark: 180.
Overall · variant 2 (9–1)
| Grade | Min mark | Min % |
|---|---|---|
| 9 | 160 | 89% |
| 8 | 147 | 82% |
| 7 | 135 | 75% |
| 6 | 120 | 67% |
| 5 | 106 | 59% |
| 4 | 92 | 52% |
| 3 | 72 | 40% |
| 2 | 53 | 30% |
| 1 | 34 | 19% |
Maximum mark: 180.
Calculate your Human Biology grade →
Figures sourced from the official Edexcel grade threshold tables. Always confirm with your exam board.