In June 2025, an A* in OCR A Level Biology A (H420) needed 187 marks out of 270 (69%), an A needed 161 (60%) and a pass at E needed 67 (25%). At AS (H020), an A needed 87 out of 140 (62%).
All marks below are raw marks, taken from OCR's published grade boundaries for the series.
A level Biology A (H420) grade boundaries, June 2025
| Grade | Marks out of 270 | Percentage |
|---|---|---|
| A* | 187 | 69% |
| A | 161 | 60% |
| B | 137 | 51% |
| C | 113 | 42% |
| D | 90 | 33% |
| E | 67 | 25% |
H420 grade boundaries by paper, June 2025
| Paper | A* | A | B | C | D | E |
|---|---|---|---|---|---|---|
| H420/01 Paper 1: Biological processes (out of 100) | 69 | 59 | 49 | 40 | 31 | 22 |
| H420/02 Paper 2: Biological diversity (out of 100) | 69 | 60 | 52 | 43 | 35 | 26 |
| H420/03 Paper 3: Unified biology (out of 70) | 49 | 42 | 36 | 30 | 24 | 19 |
Your A level grade comes from your total across all three papers, so the boundaries for each paper are a guide to how you did on that paper, not a separate grade.
AS Biology A (H020) grade boundaries, June 2025
| Grade | Marks out of 140 | Percentage |
|---|---|---|
| A | 87 | 62% |
| B | 78 | 56% |
| C | 69 | 49% |
| D | 60 | 43% |
| E | 51 | 36% |
H020 grade boundaries by paper, June 2025
| Paper | A | B | C | D | E |
|---|---|---|---|---|---|
| H020/01 Paper 1: Breadth in biology (out of 70) | 44 | 40 | 35 | 31 | 26 |
| H020/02 Paper 2: Depth in biology (out of 70) | 43 | 38 | 34 | 29 | 25 |
How to use these grade boundaries
- Sit the June 2025 paper timed, then mark it strictly with the mark scheme.
- Check your raw mark against the boundaries for that paper above to see roughly where you are.
- Read the examiners' report for every question where you dropped marks.
Boundaries move from year to year as papers get harder or easier. See how they compare across every year.
Practise with this series
- OCR A Level Biology past papers, mark schemes and examiners' reports
- OCR A Level Biology grade boundaries for every year
Source: OCR grade boundaries, June 2025 (PDF).
Weekly OCR A group masterclasses: Year 12 Wednesdays 5.15pm; Year 13 Tuesdays 6.30pm or Thursdays 5.15pm. See the group classes.