GCSEs in England are graded 9 to 1, with 9 the highest and 1 the lowest pass, and a U meaning ungraded. The scale arrived in 2017 and replaced A* to G, which is why an older relative’s certificate looks nothing like yours.
Enter a percentage and this calculator gives you the grade those boundaries would usually produce. It is a rough check for the moment you have a practice paper score in hand and want to know where it lands.
Honest detail: it uses one set of tidy ten-point boundaries, and real ones are never that tidy. Exam boards publish different boundaries for every subject in every series, so treat this as a ballpark and the official table for your board as the answer.
Enter your percentage score and this calculator estimates your GCSE grade on the 9-1 scale. Grade 9 is the highest, grade 1 is the lowest passing grade, and U means ungraded. Grade boundaries vary by exam board and year, so this is an estimate based on typical boundaries.
How the scale works
Each percentage band maps to a grade, and the calculator uses these cut-offs:
| Score | Grade | Old scale, roughly |
|---|---|---|
| 90% and above | 9 | above A* |
| 80% to 89.9% | 8 | A* |
| 70% to 79.9% | 7 | A |
| 60% to 69.9% | 6 | high B |
| 50% to 59.9% | 5 | low B to high C |
| 40% to 49.9% | 4 | C |
| 30% to 39.9% | 3 | D |
| 20% to 29.9% | 2 | E |
| 10% to 19.9% | 1 | F or G |
| below 10% | U | ungraded |
The comparisons come from where Ofqual anchored the two scales: the bottom of a grade 7 sits at the bottom of the old A, the bottom of a grade 4 at the bottom of the old C, and the bottom of a grade 1 at the bottom of the old G. Grade 9 sits above A*, since it was designed so that fewer students get it than used to get an A*.
Two grades carry official names. The Department for Education calls grade 4 a standard pass and grade 5 a strong pass. The wording the tool prints underneath is different: it calls 4 to 6 a standard pass and 7 and above a strong pass. Read that line as a rough flag rather than the official definitions.
A worked example
Put in 72% and you get Estimated GCSE Grade: 7, with “At 72.0%, your estimated grade is 7” underneath. Put in 39.9% and you drop to grade 3, one tenth of a percent below the standard pass line. That jump is the useful thing here: 40% and 39.9% are different grades, so the mark you left off a one-mark question is the whole difference.
Try 9.9%. Below 10% is a U, and the note says so plainly, you need at least 10% for a grade 1. The input takes tenths too, so 79.9% gives a 7 and 80.0% gives an 8, one mark either side of a line.
For scale, the same script across the range: 96% gives a 9, 84% an 8, 61% a 6, 47% a 4, 25% a 2. A student sitting eleven papers and scoring in the sixties on most of them comes out with a page of 6s, roughly where a solid B used to sit.
Why the real boundaries move
Boundaries are set after the papers are marked, using how the whole cohort performed. If a paper was brutal, the marks needed for each grade come down so the same standard of student gets the same grade as last year. That is why 70% can be a 7 in a hard year and a 6 in an easy one.
Boards do it separately too. AQA, Pearson Edexcel, OCR and WJEC’s Eduqas each publish their own boundaries per subject and per series, so two students with identical percentages on different boards can land on different grades.
Two things the input cannot see. Papers come as foundation or higher tier, and each tier has its own ceiling and floor, so the same percentage means different things depending on which one you were entered for. And the percentage could be a raw mark, a scaled mark or a coursework-weighted total; all three are treated the same way here.
Other tools
- German grade converter — when one system has to be explained to another
- WASSCE aggregate calculator — a different scale where lower is better
- grade rounding checker — for the marks that sit just under a boundary
Frequently asked questions
What counts as a good GCSE grade?
Grade 5 and above is a strong pass in the Department for Education’s own wording, and grade 4 is a standard pass. Colleges and sixth forms set their own entry requirements, and popular courses ask for higher grades in the subjects they care about, so check the specific course.
Why did my friend get a different grade with the same percentage?
Almost certainly a different board, a different series, or a different tier. Boundaries are set per subject per exam series, so the same percentage in two different years can give two different grades. Read the boundary table for the exact paper you sat.
Is 40% really enough to pass?
On these boundaries, yes, grade 4 is a pass. In practice 40% sits close enough to the line that it moves with the paper. If you are a mark or two either side, work out which side you are on with the published boundary for your paper, not with a tidy ten-point table.
What happens if I get a U?
A U means ungraded, which on this calculator means below 10%. You can retake in the next series, and students who do not hold at least a grade 4 in English or maths have to keep studying those subjects as part of post-16 education.
Does this work for Wales and Northern Ireland?
No. England moved to 9 to 1 in 2017, and gov.uk states directly that Wales and Northern Ireland use different GCSE grading scales, with WJEC still printing A* to G for its Welsh specifications. Use their tables instead of this one.