Baking Pan Size Converter
Switching pan sizes? Calculate how much to adjust your recipe and baking time.
Original Pan
New Pan
0.79x
Recipe multiplier — use 79% of original recipe
Baking tip: Smaller pan = thicker batter. Add 5-10 minutes to baking time and check with a toothpick.
Pan Size Area Reference
| Pan | Area (sq in) | Relative to 9" round |
|---|---|---|
| 8" round | 50 sq in | 0.79x |
| 9" round | 64 sq in | 1.00x (baseline) |
| 10" round | 79 sq in | 1.23x |
| 8" square | 64 sq in | 1.00x |
| 9" square | 81 sq in | 1.27x |
| 9x13" rect | 117 sq in | 1.83x |
| 11x7" rect | 77 sq in | 1.20x |
Key Equivalences
9" round = 8" square — these two pans have nearly identical areas and are interchangeable in most recipes without adjustment.
Two 9" rounds = one 9x13" rectangle — if you want a sheet cake instead of a layer cake, use 1.8x the batter in one 9x13 pan.