Your grade journey
AQA A level Chemistrygrade boundaries
Explore official boundaries. See where your marks take you.
74053 official seriesMaximum mark 300
Exam series
Flight log / June 2026
Grade boundaries
OfficialAll papers · 1 / 2 / 3 · Out of 300
Grade A*
255
marks / 300
Grade A
220
marks / 300
Grade C
142
marks / 300
Grade E
66
marks / 300
All grade thresholds
| Grade | Minimum mark | Mark range | % of maximum |
|---|---|---|---|
| A* | 255 | 255–300 | 85% |
| A | 220 | 220–254 | 73% |
| B | 181 | 181–219 | 60% |
| C | 142 | 142–180 | 47% |
| D | 104 | 104–141 | 35% |
| E | 66 | 66–103 | 22% |
| U | Below 66 | ||
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 | 255+16 | 220+23 | 181+19 | 142+15 | 104+11 | 66+7 |
| June 2025 | 239 | 197-1 | 162 | 127+1 | 93+3 | 59+4 |
| June 2024 | 239 | 198 | 162 | 126 | 90 | 55 |
+ 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.
220 marks needed for Grade A.
Frequently asked questions
What did you need for a grade E in Chemistry in June 2026?
In June 2026, grade E in AQA A level Chemistry (7405) needed 66 out of 300 on all papers.
What was the boundary for a grade A* in June 2026?
255 out of 300 on all papers — the top grade for A level Chemistry 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?
AQA 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.