Cake pan size converter
The recipe’s pan in, your pan in, the amounts out.
Examples temporarily replace the input and settings. You can restore your previous work.
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Output
Paste or type above to see the result here.
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This tool runs entirely in your browser. What you paste is processed on your device and is never sent to a server, so it is safe to use with tokens, keys and unpublished text.
Example
Worked example — Cake pan size converter
Use the following inputs and settings. Keep other settings at the page defaults.
| Item | Value |
|---|---|
| Input | 2 cups flour |
| mode | pan |
| Pan sizes in | Centimetres |
| The recipe’s pan (diameter, or length × width) | 20 |
| My pan | 30 |
| Output | × 2.25 — pan Ø 20 cm → Ø 30 cm (area 314 → 707 cm²) |
| Output | 4½ cups flour |
| Output | Scaled this way the batter stands as deep as in the original pan, so the baking time stays about the same; deeper batter takes longer, shallower batter less — test with a skewer. |
| Output | Without scaling, the batter would stand 0.44 times as deep. |
Expected result — × 2.25 — pan Ø 20 cm → Ø 30 cm (area 314 → 707 cm²)
How it works
- Paste the ingredient list, one ingredient a line.
- Choose the pan shapes and type the sizes: a diameter for a round pan (9), length × width for a rectangular one (9 x 13).
- Every amount is multiplied by the ratio of the pans’ areas, so the batter is as deep as the recipe meant.
Frequently asked questions
- How is the pan size converted?
- By area: a round pan’s is π × radius², a rectangular one’s length × width. From a 9-inch round (63.6 sq in) to an 8-inch (50.3 sq in) is × 0.79.
- What about the baking time?
- With the batter as deep as before, it stays about the same. A deeper batter needs longer and a shallower one less, so test with a skewer a little early.
- Can I use a square or rectangular pan instead of a round one?
- Yes: choose round → rectangular and type the rectangle as length x width. A square is the same length both ways (8 x 8).
- Does it work in centimetres?
- Yes: choose centimetres, or type cm after the size (26 cm).
- Is anything uploaded?
- No. It is worked out in your browser, and nothing you type leaves your computer.