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Cake Pan Substitution

Recipe scale factor when swapping pan sizes.

Have (recipe calls for)

Want to use

Scale recipe by
1.84×
multiply all ingredients

Have area: 63.6 sq in

Want area: 117.0 sq in

Common pan sizes

  • 8" round ≈ 50 sq in
  • 9" round ≈ 64 sq in
  • 10" round ≈ 79 sq in
  • 8" square ≈ 64 sq in
  • 9" square ≈ 81 sq in
  • 9x13" rectangle ≈ 117 sq in
  • 8.5x4.5" loaf ≈ 38 sq in
  • 9x5" loaf ≈ 45 sq in
  • 10" tube/bundt ≈ 55 sq in

Substitute pans by surface area. Multiply all ingredients by the ratio. Watch baking time - smaller batches in bigger pans bake faster, larger batches in smaller pans bake longer. Bundt and tube pan have a hole, so subtract about 30 percent.

About

Pick the pan a recipe calls for and the one you want to use. The tool computes the surface-area ratio so you know how much to scale ingredients. Bundt pans get a 30 percent discount for the hole.

How to use

  1. Pick the pan you have.
  2. Pick the pan you want.

FAQ

Will baking time change?+

Yes. Wider, shallower pans bake faster. Deeper pans bake longer. Check 5 to 10 minutes earlier than the recipe says, and use a toothpick test.