Edexcel IGCSE Biology Grade Predictor 2026 (4BI1)

Predictions for Edexcel IGCSE Biology 4BI1 are based on the historical average of official grade boundaries from the 2019–2026 May/June series. The Biology A*/grade-A* threshold has typically varied by about ±15 marks from year to year. Use the prediction as a guide for revision planning, not a guarantee of your actual grade.

Historically, Edexcel IGCSE Biology (4BI1) has needed around 139/180 marks for A*. The next grade down (A) typically opens at 122 marks. Enter your mock marks above to see exactly where your current performance sits and the gap to the next grade up.

Yes — enter the papers you've sat so far and leave the others blank. The tool scales your total proportionally to 180 marks (the full Edexcel IGCSE Biology 4BI1 mark total) and surfaces a partial-prediction warning so you know it's an estimate.

The Edexcel IGCSE Biology Grade Boundary Tracker shows you year-by-year published boundaries — useful for looking up a specific past paper's grade. The Grade Predictor takes your mock marks across all papers, combines them, and gives you a forward-looking prediction with marks-to-next-grade guidance.

Edexcel IGCSE Biology 4BI1 is assessed over 2 components: Paper 1 (Biology — Core + Extended) (90 marks); Paper 2 (Biology — Extended only) (90 marks). The total for the qualification is 180 marks. Enter your marks per component above for the most accurate prediction.