Bundt to Round Pan Converter
Convert batter amounts between bundt pans and round cake pans.
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Bundt pans are measured by volume capacity (cups) while round pans are measured by diameter and depth. A standard 12-cup bundt holds roughly the same batter as two 9-inch round pans. The key is comparing volume and filling to 2/3 capacity to prevent overflow.
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Frequently asked questions
A 12-cup bundt holds about the same as two 9×2 inch round pans (8.8 cups each). A single 10×3 inch round pan (16.3 cups) also works with slightly thinner batter.
Fill a bundt pan 2/3 full to allow room for rising. A 12-cup bundt should hold about 8 cups of batter. Overfilling causes batter to overflow or the cake to dome and crack.
A recipe for two 9-inch rounds will fill most 10-12 cup bundt pans. Bake at the same temperature but check for doneness 5-10 minutes later due to the pan's depth.
Bundt pans have thick walls and a deep profile, so the center takes longer to reach baking temperature. Increase time by 10-15 minutes compared to layer cakes.
A 9×2 inch round pan holds approximately 8.8 cups. A 9×3 inch holds about 13.2 cups. Always multiply π × r² × depth, then divide by 14.44 to convert cubic inches to cups.