Short answer

70% in IGCSE is typically a grade B or C, depending on the subject and exam series. Grade boundaries change each year, so a fixed percentage-for-grade mapping is not possible.

How grades work

• Cambridge IGCSE: Grades A*–G; boundaries are set after each exam series
• Edexcel IGCSE: Similar grading; boundaries vary
• No fixed scale: 70% could be B in one subject/series and C in another

Practical takeaway

Don’t assume a fixed percentage = grade. Check the grade boundaries for your exam series and subject. Cambridge and Pearson publish these after each session.

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