9 square to 9x13 rect Pan Converter

Convert cake recipe dimensions. Compare area, height, batter volumes, and calculate the exact recipe multiplier.

Baking Pan Size Calculator

Recipe Calls For

You Want to Use

Recipe Multiplier

1.44x

To use a 9x13 inch Rectangular Pan instead of a 9 inch Square Pan, multiply all ingredients in the recipe by 1.44.

Larger Pan AlertThe target pan is much larger. We suggest doubling the recipe (2.0x multiplier) or your baked goods will be very thin and dry.

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!