How to Calculate Your IGCSE and IB Grades

Understanding Grade Boundaries

Raw marks in IGCSE and IB exams are converted to grades using grade boundaries set after each exam series. Boundaries vary each year based on exam difficulty.

IGCSE Grade Boundaries (Approximate)

• Grade 9: ~90%+ of marks

• Grade 8: ~80–89%

• Grade 7: ~70–79%

• Grade 6: ~60–69%

• Grade 5: ~50–59%

• Grade 4: ~40–49% (standard pass)

IB Grade Calculation

Each IB subject is graded 1–7. Grades depend on: Paper 1 + Paper 2 (+ Paper 3 for HL) + Internal Assessment. The weighting varies by subject. Your total subject points contribute to the Diploma total (max 45 including Core bonus).

Predicted Grades

IB predicted grades are set by your teacher based on in-class performance and mock exams. They are critical for university applications. Aim to perform consistently in class, not just in final exams.