Baking Pan Conversion
Convert recipes between different baking pan sizes. Calculate the scaling factor for any pan swap.
9" × 13" rectangular → 8" × 8" square
approximately 55%
Use approximately 55% of the original recipe so the batter depth stays the same. Baking time may need a slight adjustment.
Common pan sizes
| 8" × 8" square | 64 in² |
| 9" × 9" square | 81 in² |
| 9" × 13" rectangular | 117 in² |
| 11" × 7" rectangular | 77 in² |
| 8" round | 50.3 in² |
| 9" round | 63.6 in² |
| 10" round | 78.5 in² |
| 9" springform | 63.6 in² |
| 10" springform | 78.5 in² |
| 13" × 9" × 2" rectangular | 117 in² |
Conversion Summary
9" × 13" rectangular=117 in²=8" × 8" square=64 in²=55% Scaling percentage=× 0.55
How it works
Baking pans are compared by surface area. The ratio of the new pan's area to the original tells you how to scale the recipe so the batter depth stays the same.
Conversion Table
| Original pan | 9" × 13" rectangular |
| Original area | 117 in² |
| New pan | 8" × 8" square |
| New area | 64 in² |
| Scaling percentage | 55% |
| Scaling multiplier | × 0.55 |
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