Your grade journey
Edexcel GCSE Chemistrygrade boundaries
Explore official boundaries. See where your marks take you.
1CH03 official seriesMaximum mark 200
Exam series
Tier / route
Flight log / June 2026
Grade boundaries
OfficialHigher tier · 1H / 2H · Out of 200
Grade 9
165
marks / 200
Grade 7
127
marks / 200
Grade 5
79
marks / 200
Grade 4
55
marks / 200
All grade thresholds
| Grade | Minimum mark | Mark range | % of maximum |
|---|---|---|---|
| 9 | 165 | 165–200 | 83% |
| 8 | 146 | 146–164 | 73% |
| 7 | 127 | 127–145 | 64% |
| 6 | 103 | 103–126 | 52% |
| 5 | 79 | 79–102 | 40% |
| 4 | 55 | 55–78 | 28% |
| 3 | 43 | 43–54 | 22% |
| U | Below 43 | ||
These boundaries apply to this exam series and route. Paper maximums ↗
How these boundaries have changed
Higher tier, every official series. Boundaries move each year with how hard the papers were.
| Series | 9 | 8 | 7 | 6 | 5 | 4 | 3 |
|---|---|---|---|---|---|---|---|
| June 2026 | 165+4 | 146+2 | 127-1 | 103-3 | 79-5 | 55-7 | 43-8 |
| June 2025 | 161+13 | 144+16 | 128+19 | 106+19 | 84+18 | 62+17 | 51+17 |
| June 2024 | 148 | 128 | 109 | 87 | 66 | 45 | 34 |
+ higher than the same series a year earlier (harder to reach) · − lower (easier to reach).
Grade calculator
June 2026 · Higher tier
Enter your mark for each paper to see your grade.
127 marks needed for Grade 7.
Frequently asked questions
What did you need for a grade 4 in Chemistry in June 2026?
In June 2026, grade 4 in Pearson Edexcel GCSE Chemistry (1CH0) needed 118 out of 200 on foundation tier; 55 out of 200 on higher tier.
What was the boundary for a grade 9 in June 2026?
165 out of 200 on higher tier — the top grade for GCSE 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?
Pearson Edexcel 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.