Cake pan size converter
Switch the pan in your recipe: compare the area of round, square and rectangular pans and find out how much to multiply the ingredients for a cake, pie or flan.
How to useRound pan recipe in a rectangular pan
Available in: 
Cake pan size converter: what it is for
Choose the shape and size of the pan in the recipe and of the pan you have. The tool works out the base area of each one and shows the factor to multiply the ingredients by to keep the same batter height, plus how tall the original recipe would be in the new pan.
How to use
- Enter the recipe pan.
- Enter the pan you will use.
- Multiply the ingredients by the factor.
When to use it
- Baking a round pan cake in a rectangular pan.
- Scaling a pie for a larger pan.
- Using a tube pan.
Frequently asked questions
How do I know if a recipe fits another pan?
Compare the base area of the pans. A 9-inch (23 cm) round pan has about 64 square inches, and a 9 × 13 inch pan has 117, so you need about 1.8 times the recipe for the same height.
What about baking time?
With the same batter height, the time changes little. If the batter ends up taller, lower the temperature a little and bake longer; if it is shallower, check earlier.
How do I measure the pan?
Measure the base on the inside, from edge to edge. For tube pans, also enter the diameter of the hole so its area is subtracted.
Is it really free?
Yes, 100% free. No sign-up, no subscription and no usage limits. All Tools123 tools are free and run right in your browser.