Kitchen / Baking
Baking Pan Size Converter
Bake a recipe in a different pan: compare round, square, and rectangular pans by area to get how much to multiply the recipe by, and how to adjust the baking time.
Baking Pan Size Converter: What matters when swapping pans is the base area, because a cake bakes evenly when the batter is as deep as the recipe intended. The converter works out the area of each pan, πr² for a round pan and side times side for a square or rectangle, and divides one by the other: that is the factor to scale the ingredients by. It also shows how much deeper or shallower the batter would be without scaling, which changes the baking time. Runs 100% locally in your browser with zero server file uploads.
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Multiply the recipe by 1.27
Recipe pan 50.27 in²; your pan 63.62 in².
- Scaled by 1.27, the batter is as deep as in the recipe, so the baking time stays about the same; check a few minutes early, and allow a little longer for a much larger pan.
- Without scaling, the batter would be 0.79 times as deep: it bakes faster, so start checking well before the recipe's time.
- To scale the ingredients, use the recipe scaler with this number.
Scaling the recipe
Multiply every ingredient by the factor. Eggs rarely divide neatly: beat them and weigh what you need, about 50 g per large egg without the shell. The recipe scaler does the multiplication for a whole ingredient list, and the cooking converter turns cups into grams.
Pan material and depth
Dark metal pans bake faster than light ones, and glass holds heat, so with glass lower the oven by about 15 °C (25 °F). A pan's capacity also depends on its depth: a 5 cm (2-inch) deep pan holds more than a shallow one of the same width, so for very deep or shallow pans compare volumes of water instead.
How to use it
- Choose the pan the recipe uses, from the list or by its size.
- Choose your pan.
- Multiply the recipe by the number shown, and follow the baking time advice.
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Frequently asked questions
Can I use a 9-inch pan instead of an 8-inch?
Yes. A 9-inch round pan has about 1.27 times the area of an 8-inch, so either scale the recipe by 1.27 or bake it as it is: the cake will be thinner and bake a few minutes faster, so check it early.
What size pan equals two 9-inch rounds?
Two 9-inch rounds have about 127 square inches, close to a 9 × 13-inch pan at 117, so a two-layer cake recipe fills a 9 × 13 pan slightly deeper. Bake it a little longer at the same temperature.
How do I adjust the baking time?
If the batter is the same depth, the time stays about the same. If it is deeper, lower the oven by about 15 °C (25 °F) and bake longer, so the middle cooks before the edges overbake; if shallower, check much earlier. A skewer that comes out clean is the reliable test.
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