On the most recent published boundaries, a 6-6 in Edexcel GCSE Combined Science (Higher tier) needed 187 out of 360 — 52%. That is June 2025's boundary, not a promise about next summer.
| Marks needed (June 2025) | 187 / 360 |
| As a percentage | 52% |
| Marks above a 6-5 | 20 |
| Marks short of a 7-6 | 20 |
| Series on record | 1 (June 2025) |
Based on the 6-6 boundary of 187 out of 360. Next summer's boundary will differ — see the range below.
| Series | Marks | % |
|---|---|---|
| June 2025 | 187 | 52% |
There is only one series on record here — June 2025 — so there is no range to reason from. Boundaries routinely move by ten marks or more between years, so treat 187 as a marker rather than a target: 189 is the number to aim at, and more if you can.
Boundaries are set after every paper is marked, precisely so that a grade means the same thing in an easy year and a hard one. That is why nobody — not this page, not your teacher, not the board — can tell you next summer's number in advance. Anyone who gives you one exactly is guessing.
187 out of 360 — 52% — on the June 2025 boundaries. That is the only series on record, so aim nearer 189 to leave room for a year that has not happened yet.
Almost certainly not. Boundaries are set after marking so that a grade represents the same standard however hard the paper was. A harder paper gets a lower boundary and an easier one gets a higher boundary.
20 marks on the most recent boundaries — usually a question or two, not a different student.
Boundaries read 18 August 2026 from the official Edexcel document: source PDF.
Boundaries read 19 August 2026 from the exam boards' own documents. Boundaries are set per series and never apply to a future paper.