18 cm / 7 in square vs Springform 20 cm / 8 in
| 18 cm / 7 in square | Springform 20 cm / 8 in | |
|---|---|---|
| Size | 18 × 18 cm | 20 cm across |
| Base area | 324 cm² | 314.2 cm² |
| Usual depth | 5 cm | 7 cm |
| Holds | 1.62 L | 2.04 L |
Can you swap them?
Swap them freely. The areas are within 3.1% of each other, which is less than the variation between two tins of the same nominal size from different manufacturers. Use the recipe as written.
Scaling the recipe
| Recipe written for | Baked in | Multiply by | Or leave it and get |
|---|---|---|---|
| 18 cm / 7 in square | Springform 20 cm / 8 in | 0.97 | 103% of the depth |
| Springform 20 cm / 8 in | 18 cm / 7 in square | 1.03 | 97% of the depth |
Multiply every ingredient, including the eggs — round to the nearest half egg and adjust the liquid rather than rounding a whole one up.
Baking time
The depths work out the same here, so use the time as written. Why depth sets the time and diameter barely does →
Frequently asked questions
Can I use a Springform 20 cm / 8 in instead of a 18 cm / 7 in square?
Yes, with the mixture multiplied by 0.97. Springform 20 cm / 8 in has 314.2 cm² of base against 324 cm², so an unscaled 18 cm / 7 in square recipe sits 103% as deep and bakes faster.
What is the difference between a 18 cm / 7 in square and a Springform 20 cm / 8 in?
18 cm / 7 in square has a base area of 324 cm² and Springform 20 cm / 8 in has 314.2 cm² — 18 cm / 7 in square is 3.1% larger. At their usual depths they hold 1.62 L and 2.04 L.
Do I need to change the baking time between a 18 cm / 7 in square and a Springform 20 cm / 8 in?
No. The two areas are within 3.1%, so the batter sits at effectively the same depth and bakes in the same time.
18 cm / 7 in square in full · Springform 20 cm / 8 in in full · All tin comparisons · All baking tin sizes