23cm square tin to 20cm square tin
Multiply every ingredient by
×0.76
A 20cm square tin (8in) has 24% less area than a 23cm square tin (9in). Same depth of cake, less mixture.
| In the recipe | For your tin |
|---|---|
| 100g | 76g |
| 250g | 189g |
| 3 eggs | 2.3 eggs |
Paste your recipe into the scaler, already set to ×0.76. It rounds everything sensibly and tells you what to do with part of an egg.
The working
23cm square tin: 529cm² of base. 20cm square tin: 400cm². 400 ÷ 529 = 0.76. This assumes both tins are the same depth.