Baking Pan Size Converter — Swap Pans & Scale Batter
~1 minute
Enter your original pan and the pan you want to use. The calculator computes the geometric volume of each and gives a batter scale factor (how much to scale your recipe), plus a warning when the batter depth will change meaningfully. Pan volume is pure geometry — no sourcing needed. Fill level is a convention (fill pans ½ to ⅔ full).
What this calculator determines
It compares the geometric volume of two baking pans and gives a batter scale factor — target volume divided by original volume — for swapping pans.
Related calculators
Examples
8×8 → 9×9 square
8×8×2 → 9×9×2
Calculation
- 8×8×2 = 128 in³
- 9×9×2 = 162 in³
- Scale = 162 ÷ 128 = 1.27×
Scale batter by 1.27× — depth increases
Assumptions & Conventions
- Geometric pan volume
- The scale factor uses full geometric pan volume from the dimensions and height you enter (rectangular, square, or round), not pan base area.
- Fill guidance is informational
- The ½-to-⅔ fill recommendation is an informational convention; it does not alter the volume-based scale factor.
- Depth flag is advisory
- The batter-depth warning flags a meaningful depth change so you can adjust bake time; it does not model actual batter fill depth separately.