IGCSE Chemistry (4CH1) grade boundaries — June 2025
Edexcel International GCSE (Pearson) (4CH1). 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 Chemistry required 151/180 (84%) on overall (9–1).
- That 9 threshold is 5 marks higher than June 2024 — slightly harder to achieve.
- Across paper variants, the 9 boundary ranged from 151 to 154 marks — variant choice mattered this session.
- A grade 4 needed roughly 44% on overall (9–1).
Overall (9–1)
| Grade | Min mark | Min % |
|---|---|---|
| 9 | 151 | 84% |
| 8 | 134 | 75% |
| 7 | 117 | 65% |
| 6 | 104 | 58% |
| 5 | 91 | 51% |
| 4 | 79 | 44% |
| 3 | 62 | 35% |
| 2 | 45 | 25% |
| 1 | 29 | 17% |
Maximum mark: 180.
Overall · variant 2 (9–1)
| Grade | Min mark | Min % |
|---|---|---|
| 9 | 154 | 86% |
| 8 | 136 | 76% |
| 7 | 119 | 67% |
| 6 | 106 | 59% |
| 5 | 93 | 52% |
| 4 | 81 | 45% |
| 3 | 64 | 36% |
| 2 | 47 | 27% |
| 1 | 31 | 18% |
Maximum mark: 180.
Calculate your Chemistry grade →
Figures sourced from the official Edexcel grade threshold tables. Always confirm with your exam board.