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Christmas Cake Calculator

Calculate dried fruit, butter, flour, and alcohol quantities for Christmas cake by tin size.

How We Calculate This

This calculator scales a traditional British Christmas cake recipe based on tin area. The base recipe is for a 20cm round tin and uses the classic rich fruit cake ratio with equal weights of currants, sultanas, and raisins.

How Scaling Works

  • The tin area is calculated (circular or square) and compared to the 20cm round base
  • All ingredients are multiplied by the area ratio to maintain the correct batter depth
  • Baking time is adjusted based on the square root of the ratio, as larger cakes take proportionally less extra time

Base Recipe (20cm Round)

  • 300g each currants, sultanas, raisins
  • 175g butter, 175g dark brown sugar, 175g plain flour
  • 3 large eggs, 50ml brandy
  • 75g mixed peel, 75g glace cherries, 50g blanched almonds

Frequently Asked Questions

Last updated: February 2026

All calculations are based on standard ratios and conversions. Results may vary with specific ingredients, equipment, and conditions.