Your grade journey
OCR A level Chemistry B (Salters)grade boundaries
Explore official boundaries. See where your marks take you.
H4333 official seriesMaximum mark 270
Exam series
Flight log / June 2026
Grade boundaries
OfficialAll papers · 01 / 02 / 03 · Out of 270
Grade A*
226
marks / 270
Grade A
198
marks / 270
Grade C
136
marks / 270
Grade E
74
marks / 270
All grade thresholds
| Grade | Minimum mark | Mark range | % of maximum |
|---|---|---|---|
| A* | 226 | 226–270 | 84% |
| A | 198 | 198–225 | 73% |
| B | 167 | 167–197 | 62% |
| C | 136 | 136–166 | 50% |
| D | 105 | 105–135 | 39% |
| E | 74 | 74–104 | 27% |
| U | Below 74 | ||
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 | 226+10 | 198+22 | 167+21 | 136+19 | 105+17 | 74+15 |
| June 2025 | 216-5 | 176-10 | 146-10 | 117-10 | 88-10 | 59-10 |
| June 2024 | 221 | 186 | 156 | 127 | 98 | 69 |
+ 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.
198 marks needed for Grade A.
Frequently asked questions
What did you need for a grade E in Chemistry B (Salters) in June 2026?
In June 2026, grade E in OCR A level Chemistry B (Salters) (H433) needed 74 out of 270 on all papers.
What was the boundary for a grade A* in June 2026?
226 out of 270 on all papers — the top grade for A level Chemistry B (Salters) 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.