Your grade journey
Edexcel International GCSE Chemistrygrade boundaries
Explore official boundaries. See where your marks take you.
4CH12 official seriesMaximum mark 180
Exam series
Papers
Flight log / June 2026
Grade boundaries
OfficialPapers 1C 2C · Out of 180
Grade 9
141
marks / 180
Grade 7
103
marks / 180
Grade 5
78
marks / 180
Grade 4
66
marks / 180
All grade thresholds
| Grade | Minimum mark | Mark range | % of maximum |
|---|---|---|---|
| 9 | 141 | 141–180 | 78% |
| 8 | 122 | 122–140 | 68% |
| 7 | 103 | 103–121 | 57% |
| 6 | 90 | 90–102 | 50% |
| 5 | 78 | 78–89 | 43% |
| 4 | 66 | 66–77 | 37% |
| 3 | 53 | 53–65 | 29% |
| 2 | 41 | 41–52 | 23% |
| 1 | 29 | 29–40 | 16% |
| U | Below 29 | ||
These boundaries apply to this exam series and route. Paper maximums ↗
How these boundaries have changed
Papers 1C 2C, every official series. Boundaries move each year with how hard the papers were.
| Series | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 |
|---|---|---|---|---|---|---|---|---|---|
| June 2026 | 141-10 | 122-12 | 103-14 | 90-14 | 78-13 | 66-13 | 53-9 | 41-4 | 29 |
| June 2025 | 151 | 134 | 117 | 104 | 91 | 79 | 62 | 45 | 29 |
+ higher than the same series a year earlier (harder to reach) · − lower (easier to reach).
Grade calculator
June 2026 · Papers 1C 2C
Enter your mark for each paper to see your grade.
103 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 International GCSE Chemistry (4CH1) needed 66 out of 180 on papers 1c 2c; 77 out of 180 on papers 1cr 2cr.
What was the boundary for a grade 9 in June 2026?
141 out of 180 on papers 1c 2c; 150 out of 180 on papers 1cr 2cr — the top grade for International 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.