18 cm / 7 in round vs Loaf 21.5 × 11.5 cm / 8½ × 4½ in
| 18 cm / 7 in round | Loaf 21.5 × 11.5 cm / 8½ × 4½ in | |
|---|---|---|
| Size | 18 cm across | 22 × 12 cm |
| Base area | 254.5 cm² | 247.3 cm² |
| Usual depth | 5 cm | 7 cm |
| Holds | 1.27 L | 1.61 L |
Can you swap them?
Swap them freely. The areas are within 2.9% 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.
Nothing standard sits between these two, so this is the smallest change available in this shape.
Scaling the recipe
| Recipe written for | Baked in | Multiply by | Or leave it and get |
|---|---|---|---|
| 18 cm / 7 in round | Loaf 21.5 × 11.5 cm / 8½ × 4½ in | 0.97 | 103% of the depth |
| Loaf 21.5 × 11.5 cm / 8½ × 4½ in | 18 cm / 7 in round | 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 Loaf 21.5 × 11.5 cm / 8½ × 4½ in instead of a 18 cm / 7 in round?
Yes, with the mixture multiplied by 0.97. Loaf 21.5 × 11.5 cm / 8½ × 4½ in has 247.3 cm² of base against 254.5 cm², so an unscaled 18 cm / 7 in round recipe sits 103% as deep and bakes faster.
What is the difference between a 18 cm / 7 in round and a Loaf 21.5 × 11.5 cm / 8½ × 4½ in?
18 cm / 7 in round has a base area of 254.5 cm² and Loaf 21.5 × 11.5 cm / 8½ × 4½ in has 247.3 cm² — 18 cm / 7 in round is 2.9% larger. At their usual depths they hold 1.27 L and 1.61 L.
Do I need to change the baking time between a 18 cm / 7 in round and a Loaf 21.5 × 11.5 cm / 8½ × 4½ in?
No. The two areas are within 2.9%, so the batter sits at effectively the same depth and bakes in the same time.
Related comparisons
- 15 cm / 6 in round vs 18 cm / 7 in round
- 18 cm / 7 in round vs 20 cm / 8 in round
- 18 cm / 7 in round vs Loaf 23 × 13 cm / 9 × 5 in
- Loaf 21.5 × 11.5 cm / 8½ × 4½ in vs Loaf 23 × 13 cm / 9 × 5 in
- Loaf 21.5 × 11.5 cm / 8½ × 4½ in vs Springform 18 cm / 7 in
18 cm / 7 in round in full · Loaf 21.5 × 11.5 cm / 8½ × 4½ in in full · All tin comparisons · All baking tin sizes