What grade is my mark? GCSE grade calculator
Enter your mark and the calculator gives the grade it earned in the June 2025 series, using the raw-mark boundaries your exam board published. There is no single percentage for a grade 9: in AQA Higher maths it was 219 out of 240, but in AQA Higher biology it was 141 out of 200. Same board, same summer, twenty percentage points apart.
Last updated 23 August 2026 · Built and checked by the GCSEwiz team
240 marks are available across the whole subject.
Every boundary for this paper, June 2025
| Grade | Marks needed | Percentage |
|---|---|---|
| 9 | 219 | 91% |
| 8 | 191 | 80% |
| 7 | 164 | 68% |
| 6 | 130 | 54% |
| 5 | 96 | 40% |
| 4 | 63 | 26% |
| 3 | 46 | 19% |
Why "a 9 is about 90%" is wrong
Almost every grade calculator online works the same way: it assumes a fixed percentage for each grade, usually something like 90% for a 9 and 50% for a 4, and converts your mark against that. It is a reasonable guess. It is also, for most subjects, wrong by a wide margin.
Boundaries are set after the papers are marked, subject by subject, once the boards can see how hard students found them. A harder paper gets lower boundaries. That is the mechanism working as intended, and it means the number moves every year and differs enormously between subjects sitting the same summer. In June 2025 a grade 4 on AQA Foundation maths needed 160 marks out of 240, which is 67%. A grade 4 on AQA Higher biology needed 56 out of 200, which is 28%.
This calculator holds the marks the boards actually awarded, so it does not have to guess.
How to read the answer
A boundary is a minimum. A mark sitting exactly on it earns that grade, and one mark below it does not, which is why results day is so tense for so many people.
- The grade shown is what your mark would have earned in June 2025, on that board and tier.
- The "marks away" figure is the gap to the next grade up, in raw marks rather than percentages.
- Where your subject is examined as several option combinations, the calculator says so and shows how far apart those options were.
- Combined Science is graded on the double scale (9-9 down to 1-1) because that is how the boards award it, not on the single 9-1 scale.
What this cannot tell you
It cannot tell you next summer's boundaries, because nobody knows them yet, including the boards. They are set each series against that year's papers and that year's cohort. Treat last year's figures as the best available guide to roughly where the bar sits, and not as a promise.
It also cannot account for your specific option codes in subjects like History, where a board may publish well over a hundred different boundary rows. The calculator uses the middle of that range and tells you how wide it was.
Converting a percentage to a grade
If what you have is a percentage rather than a raw mark - a mock result handed back as "63%", say - a percentage-to-grade conversion is still possible, but only via the marks. Multiply the percentage by the paper's total to recover your raw mark (63% of a 240-mark maths series is about 151 marks), then read that mark against the published boundaries here. What you should not do is trust a fixed percentage-band table, for the reason this whole page exists: the percentage a grade needs genuinely differs by twenty points or more between subjects on the same board in the same summer.