Two grading scales
Cambridge IGCSE subjects are usually graded A* (highest) to G (lowest). Many also have a separate 9 to 1 version with its own syllabus code, for example Mathematics 0580 (A* to G) and 0980 (9 to 1). The content and papers are the same; only the grading differs. Cambridge offers 9 to 1 grading to schools in certain regions, and a candidate cannot take both versions in the same series.
Pearson Edexcel International GCSE subjects are graded 9 (highest) to 1. In Maths A, for example, Foundation tier offers grades 5 to 1, and Higher tier offers 9 to 4, with grade 3 allowed.
Below the lowest grade is U (ungraded).
How 9 to 1 lines up with A* to G
Cambridge sets three fixed anchor points: "The standards at the thresholds of grades 7, 4 and 1 are the same as the standards at the thresholds of grades A, C and G."
| 9 to 1 | A* to G | What Cambridge says |
|---|---|---|
| 7 | A | Same standard at the start of the grade |
| 4 | C | Same standard at the start of the grade |
| 1 | G | Same standard at the start of the grade |
| 9, 8, 6, 5, 3, 2 | No direct match | Boundaries set between the anchor points; grade 9 is set separately |
Cambridge sets the boundaries for 8, 6, 5, 3 and 2 at regular intervals between the boundaries for 9, 7, 4 and 1. Grade 9 is set using statistical and expert evidence.
Core and Extended (Cambridge)
Many Cambridge subjects have two levels. Which one you sit sets the range of grades available to you:
- Mathematics 0580: Core, grades C to G. Extended, grades A* to E.
- Biology 0610, Chemistry 0620, Physics 0625: Core, grades C to G. Extended, grades A* to G.
If you are aiming above a C, you need Extended. See each subject guide for the papers on each route.
Common questions
Is a grade 4 the same as a C?
Cambridge says the standard at the start of grade 4 is the same as the standard at the start of grade C. Some universities and colleges ask for a 5 where they would have asked for a C, so check the exact requirement for any course you are applying to.
Is a 7 the same as an A?
Cambridge says the standard at the start of grade 7 is the same as at the start of grade A.
What is the highest grade I can get on Core?
For Cambridge Mathematics, Biology, Chemistry and Physics, Core candidates can get up to grade C. Extended opens the higher grades.
Sources:Cambridge, how 9 to 1 grading works; Cambridge 0580, 0610, 0620 and 0625 syllabuses;Pearson Edexcel Maths A specification. Checked October 2026.