28cm round tin to 23cm round tin
Multiply every ingredient by
×0.67
A 23cm round tin (9in) has 33% less area than a 28cm round tin (11in). Same depth of cake, less mixture.
| In the recipe | For your tin |
|---|---|
| 100g | 67g |
| 250g | 169g |
| 3 eggs | 2 eggs |
Paste your recipe into the scaler, already set to ×0.67. It rounds everything sensibly and tells you what to do with part of an egg.
The working
28cm round tin: 615.75cm² of base. 23cm round tin: 415.48cm². 415.48 ÷ 615.75 = 0.67. This assumes both tins are the same depth.