Your grade journey
Edexcel International GCSE Biologygrade boundaries
Explore official boundaries. See where your marks take you.
4BI12 official seriesMaximum mark 180
Exam series
Papers
Flight log / June 2026
Grade boundaries
OfficialPapers 1B 2B · Out of 180
Grade 9
142
marks / 180
Grade 7
112
marks / 180
Grade 5
82
marks / 180
Grade 4
67
marks / 180
All grade thresholds
| Grade | Minimum mark | Mark range | % of maximum |
|---|---|---|---|
| 9 | 142 | 142–180 | 79% |
| 8 | 127 | 127–141 | 71% |
| 7 | 112 | 112–126 | 62% |
| 6 | 97 | 97–111 | 54% |
| 5 | 82 | 82–96 | 46% |
| 4 | 67 | 67–81 | 37% |
| 3 | 55 | 55–66 | 31% |
| 2 | 43 | 43–54 | 24% |
| 1 | 32 | 32–42 | 18% |
| U | Below 32 | ||
These boundaries apply to this exam series and route. Paper maximums ↗
How these boundaries have changed
Papers 1B 2B, every official series. Boundaries move each year with how hard the papers were.
| Series | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 |
|---|---|---|---|---|---|---|---|---|---|
| June 2026 | 142+2 | 127+3 | 112+3 | 97+3 | 82+3 | 67+2 | 55+1 | 43 | 32 |
| June 2025 | 140 | 124 | 109 | 94 | 79 | 65 | 54 | 43 | 32 |
+ higher than the same series a year earlier (harder to reach) · − lower (easier to reach).
Grade calculator
June 2026 · Papers 1B 2B
Enter your mark for each paper to see your grade.
112 marks needed for Grade 7.
Frequently asked questions
What did you need for a grade 4 in Biology in June 2026?
In June 2026, grade 4 in Pearson Edexcel International GCSE Biology (4BI1) needed 67 out of 180 on papers 1b 2b; 80 out of 180 on papers 1br 2br.
What was the boundary for a grade 9 in June 2026?
142 out of 180 on papers 1b 2b; 146 out of 180 on papers 1br 2br — the top grade for International GCSE Biology in June 2026.
How is my grade worked out?
Your marks from each paper are added up (scaled by a weighting factor where papers count differently) to give your subject mark, which is then compared with the boundaries. Your grade comes from the total — not from each paper separately.
When will the next boundaries be published?
Pearson Edexcel publishes grade boundaries on results day for each series. Until then, any figures shown for a future series are Starley estimates, clearly labelled, based on recent years.