18 cm / 7 in round vs Loaf 23 × 13 cm / 9 × 5 in
| 18 cm / 7 in round | Loaf 23 × 13 cm / 9 × 5 in | |
|---|---|---|
| Size | 18 cm across | 23 × 13 cm |
| Base area | 254.5 cm² | 299 cm² |
| Usual depth | 5 cm | 7 cm |
| Holds | 1.27 L | 2.09 L |
Can you swap them?
Swap without changing the recipe, but watch the oven. Loaf 23 × 13 cm / 9 × 5 in has 17.5% more area, so a mixture written for 18 cm / 7 in round sits about 85% as deep in it and browns sooner.
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 23 × 13 cm / 9 × 5 in | 1.17 | 85% of the depth |
| Loaf 23 × 13 cm / 9 × 5 in | 18 cm / 7 in round | 0.85 | 117% 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
A mixture 85% as deep is done earlier, not cooler. Leave the temperature alone, start testing at about 85% of the stated time, and let the skewer decide. Why depth sets the time and diameter barely does →
Frequently asked questions
Can I use a Loaf 23 × 13 cm / 9 × 5 in instead of a 18 cm / 7 in round?
Yes, with the mixture multiplied by 1.17. Loaf 23 × 13 cm / 9 × 5 in has 299 cm² of base against 254.5 cm², so an unscaled 18 cm / 7 in round recipe sits 85% as deep and bakes faster.
What is the difference between a 18 cm / 7 in round and a Loaf 23 × 13 cm / 9 × 5 in?
18 cm / 7 in round has a base area of 254.5 cm² and Loaf 23 × 13 cm / 9 × 5 in has 299 cm² — Loaf 23 × 13 cm / 9 × 5 in is 17.5% larger. At their usual depths they hold 1.27 L and 2.09 L.
Do I need to change the baking time between a 18 cm / 7 in round and a Loaf 23 × 13 cm / 9 × 5 in?
Yes. Moving a 18 cm / 7 in round mixture into Loaf 23 × 13 cm / 9 × 5 in makes it 85% as deep, so start checking at about 85% of the stated time. Depth drives baking time far more than tin diameter does.
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18 cm / 7 in round in full · Loaf 23 × 13 cm / 9 × 5 in in full · All tin comparisons · All baking tin sizes