Almost. One 9x13 pan is 117 sq in; two 8x8 pans total 128 sq in, about 1.09x the area. Splitting a 9x13 recipe between two 8x8 pans works well — the batter sits slightly thinner, so start checking for doneness a few minutes early.
Exact comparison
Are Two 8x8 Pans Equal to a 9x13 Pan?
Two 8x8 pans are a close area substitute for one 9x13 pan, but they are slightly larger in total area.
One 9x13 pan is 117 sq in. Two 8x8 pans total 128 sq in, about 1.09x the area of one 9x13 pan.
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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
Exact comparison
Two 8x8 Pans Are Slightly Larger
One 9x13 pan is 117 sq in. Two 8x8 pans total 128 sq in, so the pair gives about 109% of the 9x13 area.
128 sq in
1.09x
117 sq in
FAQ
8x8 vs 9x13 Pan Questions
One 8x8 pan is 64 sq in — only about 0.55x the area of a 9x13. Use roughly half the batter and bake the rest separately, or the pan will overflow. A single 8x8 is not a one-to-one swap for a 9x13.
Keep the same oven temperature. Two 8x8 pans hold the batter at nearly the same depth as a 9x13, so the time is close — check a few minutes early with a toothpick. Batter depth affects the time more than the pan shape does.
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