Baking Pan Size Converter
Swap tins without wrecking the bake — by area, not guesswork
Work out how to substitute one baking pan for another, with the exact recipe scaling factor and a timing adjustment.
Pan sizes and their baking areas
| Pan | Metric | Area | Batter capacity |
|---|---|---|---|
| 6" round | 15 cm | 28 in² | 4 cups |
| 8" round | 20 cm | 50 in² | 6 cups |
| 9" round | 23 cm | 64 in² | 8 cups |
| 10" round | 25 cm | 79 in² | 10 cups |
| 8" × 8" square | 20 × 20 cm | 64 in² | 8 cups |
| 9" × 9" square | 23 × 23 cm | 81 in² | 10 cups |
| 9" × 13" rectangle | 23 × 33 cm | 117 in² | 14 cups |
| 11" × 7" rectangle | 28 × 18 cm | 77 in² | 10 cups |
| 8½" × 4½" loaf | 21 × 11 cm | 38 in² | 6 cups |
| 9" × 5" loaf | 23 × 13 cm | 45 in² | 8 cups |
| 10" tube / bundt | 25 cm | 66 in² | 12 cups |
| 9" springform | 23 cm | 64 in² | 10 cups |
| 12-cup muffin tin | standard | 42 in² | 4.5 cups |
| Quarter sheet 9" × 13" | 23 × 33 cm | 117 in² | 14 cups |
| Half sheet 13" × 18" | 33 × 46 cm | 234 in² | 24 cups |
Why area and not volume
What changes the bake is depth. Heat travels inward from the edges, and that distance is set by area. Swap a 9×13 (117 in²) for a 9-inch round (63.6 in²) and the factor is 0.54.
Frequently asked questions
Can I use a 9×13 pan instead of two 9-inch rounds?
Yes — two 9-inch rounds give about 127 in² and a 9×13 gives 117 in², within 8%.
How full should I fill a cake tin?
About two-thirds, and never more than three-quarters.