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Cake Tin Conversion Calculator: Resize Any Recipe to a Different Tin

Hill & May team

By the Hill & May team

Updated 2026

Found a recipe written for a tin you do not own? Scale it by the base area of the tin, not the width across. A cake sits at roughly the same depth whatever the tin, so the amount of batter you need rises with area, and area climbs much faster than diameter. Jumping from a 20cm to a 23cm round tin sounds like a small change, but it needs about a third more mixture.

Tin the recipe uses

Tin you will bake in

Enter one quantity from the recipe and we will resize it for the new tin.

Depth matters too. If your only tin is a good deal wider, the batter spreads thinner and bakes quicker; a narrower but deeper tin bakes slower and can catch on the outside before the middle sets. The bake note below the multiplier flags which way to nudge your time and temperature, but always trust a skewer over the clock.

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