8 round to 9 round Pan Converter
Convert cake recipe dimensions. Compare area, height, batter volumes, and calculate the exact recipe multiplier.
Baking Pan Size Calculator
Recipe Multiplier
1.26x
To use a 9 inch Round Cake Pan instead of a 8 inch Round Cake Pan, multiply all ingredients in the recipe by 1.26.
Why Pan Area Matters
A 9-inch round cake pan has an area of 63.6 square inches, whereas a 9-inch square pan has an area of 81 square inches. That is a 27% difference in area, meaning recipes cannot be swapped 1:1 without adjusting ingredients or baking duration!