15cm square tin to 18cm square tin
Multiply every ingredient by
×1.44
A 18cm square tin (7in) has 44% more area than a 15cm square tin (6in). Same depth of cake, more mixture.
| In the recipe | For your tin |
|---|---|
| 100g | 144g |
| 250g | 360g |
| 3 eggs | 4.3 eggs |
Paste your recipe into the scaler, already set to ×1.44. It rounds everything sensibly and tells you what to do with part of an egg.
The working
15cm square tin: 225cm² of base. 18cm square tin: 324cm². 324 ÷ 225 = 1.44. This assumes both tins are the same depth.