Your grade journey
Edexcel GCSE Biologygrade boundaries
Explore official boundaries. See where your marks take you.
1BI03 official seriesMaximum mark 200
Exam series
Tier / route
Flight log / June 2026
Grade boundaries
OfficialHigher tier · 1H / 2H · Out of 200
Grade 9
170
marks / 200
Grade 7
147
marks / 200
Grade 5
105
marks / 200
Grade 4
84
marks / 200
All grade thresholds
| Grade | Minimum mark | Mark range | % of maximum |
|---|---|---|---|
| 9 | 170 | 170–200 | 85% |
| 8 | 158 | 158–169 | 79% |
| 7 | 147 | 147–157 | 74% |
| 6 | 126 | 126–146 | 63% |
| 5 | 105 | 105–125 | 53% |
| 4 | 84 | 84–104 | 42% |
| 3 | 73 | 73–83 | 37% |
| U | Below 73 | ||
These boundaries apply to this exam series and route. Paper maximums ↗
How these boundaries have changed
Higher tier, every official series. Boundaries move each year with how hard the papers were.
| Series | 9 | 8 | 7 | 6 | 5 | 4 | 3 |
|---|---|---|---|---|---|---|---|
| June 2026 | 170+3 | 158+3 | 147+3 | 126+2 | 105+1 | 84 | 73-1 |
| June 2025 | 167+1 | 155+3 | 144+5 | 124+8 | 104+11 | 84+13 | 74+14 |
| June 2024 | 166 | 152 | 139 | 116 | 93 | 71 | 60 |
+ higher than the same series a year earlier (harder to reach) · − lower (easier to reach).
Grade calculator
June 2026 · Higher tier
Enter your mark for each paper to see your grade.
147 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 GCSE Biology (1BI0) needed 115 out of 200 on foundation tier; 84 out of 200 on higher tier.
What was the boundary for a grade 9 in June 2026?
170 out of 200 on higher tier — the top grade for 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.