IGCSE Chemistry (4CH1)
Edexcel International GCSE (Pearson). Estimate your grade, check grade boundaries by exam session, and see the percentage needed for each grade.
Chemistry grade calculator
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Estimated grade
Show grade thresholds for this option
| Grade | Min mark | Min % |
|---|
Pick the tier and paper variant you sat. Boundaries differ between Core and Extended and between paper variants (exam zones), so choose the option that matches your papers. Spot a wrong number? Report it.
Percentage needed for each grade
June 2026 · Overall (9–1) · max 180.
| Grade | Min mark | Min % |
|---|---|---|
| 9 | 141 | 79% |
| 8 | 122 | 68% |
| 7 | 103 | 58% |
| 6 | 90 | 50% |
| 5 | 78 | 44% |
| 4 | 66 | 37% |
| 3 | 53 | 30% |
| 2 | 41 | 23% |
| 1 | 29 | 17% |
Chemistry grade boundaries by session
- Chemistry grade boundaries — June 2026 · 2 options
- Chemistry grade boundaries — June 2025 · 2 options
- Chemistry grade boundaries — June 2024 · 2 options