When you need to swap a pan, what matters is volume — matching the capacity keeps batter depth and bake time about the same. This chart lists the volume of common baking pans.
| Pan | Approx volume |
|---|---|
| 8-inch round | 4 cups |
| 9-inch round | 6 cups |
| 8 x 8 square | 8 cups |
| 9 x 9 square | 10 cups |
| 9 x 13 rectangle | 14 cups |
| 8 x 4 loaf | 6 cups |
| 9 x 5 loaf | 8 cups |
| 9-inch springform | 10 cups |
| 10-inch bundt | 12 cups |
| 12-cup muffin tin | about 6 cups |
Match the volume when substituting. Two 8-inch rounds hold about the same as one 9 x 13. If the new pan is deeper, expect a longer bake; if shallower, check earlier.
Convert pan sizes with the Cake Pan and Loaf Pan converters in the cooking calculators.