Baking Pan Conversion Calculator
Convert a recipe between different baking pan sizes and shapes by area or volume, free and instant in your browser.
Measure the inside of the pan at the top edge, not the rim. Common sizes are editable starting points, not brand sizes.
Result
Multiply every ingredient by
× 1.4348
Recipe pan: 529 cm² · your pan: 759 cm² — same fill depth assumed.
- The shapes differ, so edges and corners bake differently — check early.
| Ingredient | Recipe amount | Unit | For your pan |
|---|---|---|---|
Amounts are shown to two decimals for convenience; weigh eggs and leaveners rather than rounding them to whole units. Bake time and temperature are not set by pan area — check doneness early in a shallower or larger pan.
Area of a round pan is π × diameter² ÷ 4; a rectangle is length × width.
How the method works
Equal fill depth is assumed; baking time and temperature are not set by area and need checking by eye or thermometer. Fixed example values for illustration — not your result.
How to use this calculator
- Set the recipe's pan and your pan: shape, inside dimensions and how many of each. Common sizes are there to start from and can be edited.
- Keep the same fill depth (area mode), or use volume mode and enter each pan's usable depth.
- Read the multiplier, see both pans drawn to scale, and type the recipe's ingredients to get your amounts.
How it works
Round area = π × diameter² ÷ 4; square = side²; rectangle = length × width — always the inside measurements.
Multiplier = (your pans' total area) ÷ (the recipe pans' total area). Volume mode multiplies each side by its usable depth; area mode ignores depth.
Bake time and temperature are not set by area, so the tool does not give them. Check doneness early in a shallower or larger pan.
Worked example
23 × 23 cm square → 33 × 23 cm rectangle. Multiplier 33 ÷ 23 ≈ 1.4348, so 200 g of flour becomes 286.96 g. A 20 cm round to a 25 cm round is 1.5625; two pans instead of one doubles it.
Common mistakes
- Measuring across the rim instead of the inside.
- Scaling eggs to awkward fractions — weigh them instead.
- Keeping the same bake time in a much shallower pan.
Tips
- Runs entirely in your browser. Your inputs are not saved or transmitted.
Frequently asked questions
Does bake time change?
Often yes — a thinner batter in a larger pan bakes faster, so check earlier.
Round pans?
Choose Round and enter the inside diameter; the tool uses π × diameter² ÷ 4.
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Cite this tool
Zerdly. (2026). Baking Pan Conversion Calculator. Retrieved from https://www.zerdly.com/tools/baking-pan-conversion-calculator/
Tip: Enter any known values to calculate the remaining results.
Designed to run locally in your browser. Tool inputs are not intentionally stored by Zerdly unless stated otherwise.