Your grade journey
OCR A level Chemistry Agrade boundaries
Explore official boundaries. See where your marks take you.
H4323 official seriesMaximum mark 270
Exam series
Flight log / June 2026
Grade boundaries
OfficialAll papers · 01 / 02 / 03 · Out of 270
Grade A*
234
marks / 270
Grade A
200
marks / 270
Grade C
128
marks / 270
Grade E
56
marks / 270
All grade thresholds
| Grade | Minimum mark | Mark range | % of maximum |
|---|---|---|---|
| A* | 234 | 234–270 | 87% |
| A | 200 | 200–233 | 74% |
| B | 164 | 164–199 | 61% |
| C | 128 | 128–163 | 47% |
| D | 92 | 92–127 | 34% |
| E | 56 | 56–91 | 21% |
| U | Below 56 | ||
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 | 234-9 | 200-13 | 164-11 | 128-9 | 92-7 | 56-5 |
| June 2025 | 243 | 213+1 | 175+2 | 137+3 | 99+3 | 61+3 |
| June 2024 | 243 | 212 | 173 | 134 | 96 | 58 |
+ 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.
200 marks needed for Grade A.
Frequently asked questions
What did you need for a grade E in Chemistry A in June 2026?
In June 2026, grade E in OCR A level Chemistry A (H432) needed 56 out of 270 on all papers.
What was the boundary for a grade A* in June 2026?
234 out of 270 on all papers — the top grade for A level Chemistry 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.