Your grade journey
OCR A level Biology Agrade boundaries
Explore official boundaries. See where your marks take you.
H4203 official seriesMaximum mark 270
Exam series
Flight log / June 2026
Grade boundaries
OfficialAll papers · 01 / 02 / 03 · Out of 270
Grade A*
204
marks / 270
Grade A
176
marks / 270
Grade C
124
marks / 270
Grade E
72
marks / 270
All grade thresholds
| Grade | Minimum mark | Mark range | % of maximum |
|---|---|---|---|
| A* | 204 | 204–270 | 76% |
| A | 176 | 176–203 | 65% |
| B | 150 | 150–175 | 56% |
| C | 124 | 124–149 | 46% |
| D | 98 | 98–123 | 36% |
| E | 72 | 72–97 | 27% |
| U | Below 72 | ||
These boundaries apply to this exam series and route.
How these boundaries have changed
All papers, every official series. Boundaries move each year with how hard the papers were.
| Series | A* | A | B | C | D | E |
|---|---|---|---|---|---|---|
| June 2026 | 204+17 | 176+15 | 150+13 | 124+11 | 98+8 | 72+5 |
| June 2025 | 187 | 161+1 | 137+1 | 113+1 | 90+1 | 67+1 |
| June 2024 | 187 | 160 | 136 | 112 | 89 | 66 |
+ higher than the same series a year earlier (harder to reach) · − lower (easier to reach).
Grade calculator
June 2026 · All papers
Enter your mark for each paper to see your grade.
176 marks needed for Grade A.
Frequently asked questions
What did you need for a grade E in Biology A in June 2026?
In June 2026, grade E in OCR A level Biology A (H420) needed 72 out of 270 on all papers.
What was the boundary for a grade A* in June 2026?
204 out of 270 on all papers — the top grade for A level Biology A 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?
OCR 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.