Baking Pan Conversion Calculator
Convert a recipe between two pan sizes by comparing their areas. This free online cooking & kitchen calculator runs entirely in your browser — no signup, no data sent anywhere.
Inputs
Results
How It Works (Formula & Method)
Batter depth stays consistent when you scale a recipe by the ratio of pan areas. A round pan's area is π × radius²; a rectangular pan's is length × width. For reference: 8″ round ≈ 50 sq in, 9″ round ≈ 64 sq in, 9″×13″ ≈ 117 sq in. Multiply the recipe by the new-to-original area ratio.
Worked Example
Below is a worked example using the calculator's default values. The same numbers are pre-filled in the form above so you can press Calculate and see the result without typing anything.
Inputs used:
- Original Pan Area (sq in): 63.6
- New Pan Area (sq in): 81
With these inputs, the calculator computes the metrics shown in the Results panel. Change any value and press Calculate again to see how the result responds — the live widget and the chart both update instantly.
Frequently Asked Questions
What does the Baking Pan Conversion Calculator compute?
The Baking Pan Conversion Calculator takes 2 input values and returns 2 results. Convert a recipe between baking pans of different sizes by comparing their surface areas, so batter depth and bake time stay about the same.
Is my data sent to a server?
No. The Baking Pan Conversion Calculator runs entirely in your browser using static JavaScript. Your inputs are never transmitted to CalculatorHive or any third party, and nothing is stored after you close the page.
Is this calculator free to use?
Yes. Every calculator on CalculatorHive is completely free. There is no signup, no paywall, and no usage limit. The site is supported by display advertising and affiliate partnerships, which are clearly labeled.
How accurate is the result?
The math is mathematically exact for the inputs you provide. Real-world accuracy depends on how accurately your inputs reflect the real situation — defaults are typical values, not guarantees.