Scaling Recipes to Fit Any Cake Pan
Have you ever found a perfect cake recipe that calls for an 8-inch round pan, but you only own a 9x13 rectangular pan? Baking the recipe as-is will result in a flat, sad cake. Our Cake Pan Size Converter does the math so you can scale the recipe to fit perfectly.
The Math Behind the Multiplier
Baking pans are calculated by area (or volume). A 9-inch round pan has an area of roughly 63.5 square inches, while an 8-inch round pan has an area of just 50 square inches. Even though it's only a 1-inch difference in diameter, the 9-inch pan holds over 25% more batter!
How to Use Your Multiplier
Once the calculator gives you a multiplier (for example, 1.25x), you simply multiply every single ingredient in your recipe by 1.25.
- 1 cup of flour becomes 1.25 cups (1 1/4 cups).
- 2 eggs becomes 2.5 eggs (whisk 3 eggs in a bowl and pour in half).
- 1 tsp of baking soda becomes 1.25 tsp.
Frequently Asked Questions
To convert a recipe to a different pan size, you divide the area of the new pan by the area of the original pan. This gives you a multiplier (e.g., 1.5). You then multiply every ingredient in your recipe by this multiplier.
Yes, but an 8-inch round pan holds about 20% less batter than a 9-inch round pan. You will need to multiply your recipe ingredients by 0.8 to fit perfectly, or bake the excess batter as cupcakes.
Yes! If your new pan is larger and shallower (like a 9x13), the cake will bake faster. If the new pan makes the batter deeper, it will take longer to bake and you may need to lower the oven temperature slightly to prevent the edges from burning.