20cm round tin to 25cm round tin
Multiply every ingredient by
×1.56
A 25cm round tin (10in) has 56% more area than a 20cm round tin (8in). Same depth of cake, more mixture.
| In the recipe | For your tin |
|---|---|
| 100g | 156g |
| 250g | 391g |
| 3 eggs | 4.7 eggs |
Paste your recipe into the scaler, already set to ×1.56. It rounds everything sensibly and tells you what to do with part of an egg.
The working
20cm round tin: 314.16cm² of base. 25cm round tin: 490.87cm². 490.87 ÷ 314.16 = 1.56. This assumes both tins are the same depth.