IGCSE Biology (4BI1)
Edexcel International GCSE (Pearson). Estimate your grade, check grade boundaries by exam session, and see the percentage needed for each grade.
Biology grade calculator
–
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 | 142 | 79% |
| 8 | 127 | 71% |
| 7 | 112 | 63% |
| 6 | 97 | 54% |
| 5 | 82 | 46% |
| 4 | 67 | 38% |
| 3 | 55 | 31% |
| 2 | 43 | 24% |
| 1 | 32 | 18% |
Biology grade boundaries by session
- Biology grade boundaries — June 2026 · 2 options
- Biology grade boundaries — June 2025 · 2 options
- Biology grade boundaries — June 2024 · 2 options