Kitchen tool
Baking Pan Size Converter
Find out how much to scale a recipe when you swap a round, square or rectangular pan for a different size.
How it works
The amount of batter a pan needs is proportional to its base area at the same depth. The converter divides the new pan's area by the original pan's area and gives you the multiplier to apply to every ingredient. Use the servings control on any of our recipes, or multiply by hand.
- A round pan's area is π × radius², so a 9-inch round holds about 27% more than an 8-inch round.
- Keep the batter depth similar and check doneness early. Baking times change with depth more than with area.
- Avoid scaling cakes and breads by more than double or less than half: leavening and structure don't always scale. See scaling a recipe up or down.
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