25cm square tin to 23cm square tin
Multiply every ingredient by
×0.85
A 23cm square tin (9in) has 15% less area than a 25cm square tin (10in). Same depth of cake, less mixture.
| In the recipe | For your tin |
|---|---|
| 100g | 85g |
| 250g | 212g |
| 3 eggs | 2.5 eggs |
Paste your recipe into the scaler, already set to ×0.85. It rounds everything sensibly and tells you what to do with part of an egg.
The working
25cm square tin: 625cm² of base. 23cm square tin: 529cm². 529 ÷ 625 = 0.85. This assumes both tins are the same depth.