18 cm to 20 cm Cake Tin Conversion
To bake an 18 cm cake recipe in a 20 cm tin, make about 1¼ times your recipe.
The answer
×1.23
Make about 1¼ times your recipe.
One 18 cm round holds about 1.3 litres to the brim and one 20 cm round about 1.6 litres, so the new pan takes 123% as much batter to fill it just as full.
Scale my ingredients ×1.23Baking it in a 20 cm tin
- Keep the same temperature.
- A little longer than your recipe says. A typical butter cake in this pan bakes about 30–35 minutes.
Using the recipe as it is
It fills this pan only 81% as full as your recipe's pan, so the cake comes out shorter. The batter sits 19% thinner, so it bakes faster: start checking 5–10 minutes early.
Your ingredients at ×1.23
What common amounts in an 18 cm cake recipe become in a 20 cm tin. Weighing is the most accurate way to scale.
| In the recipe | Use |
|---|---|
| 100 g (flour, sugar, butter) | 123 g |
| 225 g | 278 g |
| 250 ml (milk, cream) | 309 ml |
| 3 large eggs (about 150 g out of the shell) | 185 g beaten egg (about 3½ eggs) |
| 1 tsp (baking powder, bicarbonate of soda, salt, vanilla) | 1¼ tsp |
| 1 tbsp | 1 tbsp + ¾ tsp |
Try your own pans
Set to this swap. Change the size, the depth or how many pans, or switch to inches.
Have one pan, want another
Common sizes
Measure inside the top edge. Left blank, the depth is 5.1 cm.
Common sizes
Measure inside the top edge. Left blank, the depth is 5.1 cm.
Times 1.23. Make about 1¼ times your recipe.
Your recipe
×1.23
Make about 1¼ times your recipe.
From one 18 cm round to one 20 cm round. Scaled this way, it fills the new pan just as full.
Odd number of eggs? Beat them and weigh: one large egg is about 50 g (1¾ oz).
Baking it in the new pan
- Keep the same temperature.
- A little longer than your recipe says. A typical butter cake in this pan bakes about 30–35 minutes.
Or pour the recipe in as it is
It fills this pan only 81% as full as your recipe's pan, so the cake comes out shorter. The batter sits 19% thinner, so it bakes faster: start checking 5–10 minutes early.
Your recipe also fits these, as it is:
- 15 cm square
- 7 standard cupcakes
Questions bakers ask
How do I convert an 18 cm cake recipe to a 20 cm tin?
To bake an 18 cm cake recipe in a 20 cm tin, make about 1¼ times your recipe. One 18 cm round holds about 1.3 litres to the brim and one 20 cm round about 1.6 litres, so the new pan takes 123% as much batter to fill it just as full.
What temperature and time for a 20 cm tin?
Keep the same temperature. A little longer than your recipe says. A typical butter cake in this pan bakes about 30–35 minutes.
Can I use an 18 cm cake recipe as it is in a 20 cm tin?
It fills this pan only 81% as full as your recipe's pan, so the cake comes out shorter. The batter sits 19% thinner, so it bakes faster: start checking 5–10 minutes early.
What other pans take an 18 cm cake recipe without changes?
15 cm square, 7 standard cupcakes. Each holds within about 12% of the same batter, so the cake comes out just a little thinner or taller.
More pan conversions
- 20 cm to 23 cm Cake Tin Conversion
- 23 cm to 20 cm Cake Tin Conversion
- 20 cm to 15 cm Cake Tin Conversion
- 15 cm to 20 cm Cake Tin Conversion
- 20 cm Round to Square Cake Tin Conversion
- 2 lb to 1 lb Loaf Tin Conversion
Selling it?
A different pan changes what the cake costs you
×1.23 the batter is ×1.23 the ingredient cost. Price the new size from what it really costs to make.