Cake Pan Converter & Recipe Scaler

How to scale a cake recipe

1. Enter the inside base dimensions and count of pans specified by the recipe. Choose the correct shape and unit for those pans.
2. Enter the pans you own. The result compares total base areas and gives the multiplier for the whole batch.
3. Optionally add ingredient names, amounts and units. Copy the scaled recipe only after every used row is complete.

What this calculator handles

• Round, square and rectangular straight-sided pans
• Independent centimeter or inch settings for each pan set
• One to twelve identical pans on either side
• Optional fractional ingredient amounts without changing their units

When to use it

• You have a round cake recipe but only a square tin.
• A recipe fills two pans and you want to bake it in one larger pan.
• You are doubling a layer cake across two identical pans.

Why pan area matters

A round pan’s base area is π times the square of its radius. A diameter ratio must therefore be squared: moving from 20 cm to 24 cm makes 1.44 times the area, not 1.2.

Measure the inside base, not the outer rim. The recipe amounts describe all original pans together, and the multiplier compares total areas including pan counts.

For the same initial batter depth, multiply every quantified ingredient by the full-precision factor. Fractional eggs or other pieces are shown as fractions; use a suitable measuring approach for your recipe.

Pan height, material, oven behavior and recipe chemistry still matter. Leave rising space and follow the recipe for baking checks; this tool cannot predict bake time or final height.

Limits and local processing

Calculations and ingredient entries stay in your browser. Shared site services may still make network requests. No recipe is saved by this tool.

Bundt, tube, tapered, muffin and irregular pans are outside this area model. It does not convert ingredient units or infer ingredient types.