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IGCSE Percentage to Grade Calculator
Enter your overall percentage and this tool converts it to a predicted Cambridge IGCSE grade using official grade thresholds from the June 2024 and June 2025 sessions. Because boundaries change every session and vary by paper variant, the result is shown as an honest range — for example, the Maths 0580 Extended A* boundary has recently sat anywhere between about 76% and 89%. Guide, not guarantee.
IGCSE Grade Calculator
Cambridge Mathematics (0580) · official June 2024 & June 2025 boundaries
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Mathematics Extended grade boundaries — June 2024 & June 2025
Official Cambridge thresholds as a percentage of the total (200 marks). The range shows how much the boundary moved across paper variants.
| Grade | Typical boundary | Range (variants) |
|---|---|---|
| A* | ~84.1% | 76% – 89% |
| A | ~71.6% | 62.5% – 78.5% |
| B | ~56.8% | 49% – 63.5% |
| C | ~42.2% | 36% – 48.5% |
| D | ~33.1% | 28% – 37% |
| E | ~24.3% | 20% – 27.5% |
How the conversion works
Formula: grade boundary ÷ maximum mark × 100 = boundary percentage. Your percentage is compared against each grade's boundary percentage for your subject and tier, across every published variant of the two most recent June sessions.
Worked example
You scored 72% in IGCSE Maths 0580 Extended. In June 2025 (option BX) the A boundary was 131/200 = 65.5% and the A* boundary 156/200 = 78%. 72% clears A comfortably but not A* — so the tool predicts A, and shows how far the A* range sits above you (roughly 6 to 17 percentage points across recent variants). That gap, not the single number, is what you revise against.
Sources: official Cambridge International grade-threshold tables, June 2024 + June 2025 sessions (docs 716164/741420 for 0580 and equivalents per subject). Boundaries are session-specific estimates — not affiliated with or endorsed by Cambridge.
Related tools and support
Last updated: July 2026
IGCSE Percentage to Grade — FAQ
How IGCSE percentages map to grades.
How do I convert an IGCSE percentage to a grade?
Divide the grade boundary for your subject and tier by the maximum mark, and compare your percentage against it. For example, in June 2025 the 0580 Maths Extended option BX boundary for an A* was 156 out of 200, which is 78%. This calculator does that conversion automatically across recent sessions and every paper variant, then shows the honest range.
What percentage is an A* in IGCSE Maths?
It changes every session. Across the June 2024 and June 2025 Cambridge sessions, the 0580 Extended A* boundary ranged from roughly 76% to 89% depending on the paper variant. That spread is exactly why this tool shows a range instead of a single cut-off.
Why does the same percentage give different grades in different years?
Cambridge resets grade thresholds each session to keep standards fair between easier and harder papers. A 75% on a hard paper can earn a higher grade than 75% on an easy one. Predictions from past boundaries are a guide, never a guarantee.
Which subjects does this percentage-to-grade converter cover?
Cambridge IGCSE Mathematics (0580), Additional Mathematics (0606), Biology (0610), Chemistry (0620), Physics (0625), First Language English (0500) and Literature in English (0475) — all using official Cambridge grade thresholds from the June 2024 and June 2025 sessions.
Is 70% a good IGCSE result?
On most Extended-tier subjects, 70% has recently landed around an A or a high B depending on the session and variant — for instance the June 2025 0580 Extended A boundary was 65.5% on option BX. On Core tier, 70% is typically a solid C, the highest widely available Core grade band. Context matters: check your specific subject and tier in the calculator.
What should I do if my percentage is just below a boundary?
Treat it as a borderline result and work on the highest-yield topics. A few percentage points is usually one or two exam questions. A GetYourTutors specialist who comes to your home in Dubai can identify exactly which question types are costing you those marks before the real exam.