An 8x8 pan is 64 sq in, so it holds about 0.55x the area of a 9x13 pan.
Baking pan size converter
Use A Different Baking Pan Without Guessing
Pick the pan in your recipe and the pan you actually have. The calculator compares surface area and tells you how much batter to use.
Example: if a recipe calls for a 9x13 pan and you use one 8x8 pan, use about 0.55x the batter by area.
Recipe pan
Pan you have
Batter amount
Calculator
Can I Use This Pan Instead?
Recipe calls for
Left pan
I want to use
Right pan
Use this much batter
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Select both pans to calculate a substitution.
Recipe pan area
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Your pan area
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Area difference
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Common pan areas
Conversion Chart
| Pan | Nominal size | Calculated area | Source note |
|---|---|---|---|
| 9 x 13 in rectangle | 9 x 13 in | 117.00 sq in | Nominal pan dimensions; area is calculated geometrically. |
| 8 x 8 in square | 8 x 8 in | 64.00 sq in | Nominal pan dimensions; area is calculated geometrically. |
| 9 x 9 in square | 9 x 9 in | 81.00 sq in | Nominal pan dimensions; area is calculated geometrically. |
| 8 in round | 8 in diameter | 50.27 sq in | Nominal pan dimensions; area is calculated geometrically. |
| 9 in round | 9 in diameter | 63.62 sq in | Nominal pan dimensions; area is calculated geometrically. |
| 9 x 5 in loaf | 5 x 9 in | 45.00 sq in | Nominal pan dimensions; area is calculated geometrically. |
Formula
How The Multiplier Is Calculated
Area is calculated from nominal pan dimensions. The batter multiplier is target area divided by source area.
- Rectangle and square: width x length.
- Round: pi x radius squared.
- Display values are rounded for readability.
target area
multiplier =
source area
Worked examples
Common Calculator Results
A 9x9 pan is 81 sq in, about 0.69x the area of a 9x13 pan.
A 9-inch round pan is about 63.62 sq in, close to 0.54x a 9x13 pan.
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