CookMeasureWhy area, not diameter
A 9″ round looks only a little bigger than an 8″, but area grows with the square of the diameter: it holds 27% more batter. The overlay above shows the recipe pan dashed over your pan so you can see the difference.
Pan area chart
| Pan | Area (sq in) |
|---|---|
| 6″ round | 28.3 |
| 8″ round | 50.3 |
| 9″ round | 63.6 |
| 10″ round | 78.5 |
| 8″ square | 64 |
| 9″ square | 81 |
| 9×13″ rectangle | 117 |
| 9×5″ loaf | 45 |
| 10″ Bundt (approx.) | 78 |
| 12-cup muffin tin | 36 |
Keep pan depth in mind: a 2″-deep pan holds more than a 1½″ pan of the same diameter. Bake deeper batter at the same temperature for longer; a toothpick inserted in the centre should come out clean.
Questions cooks ask
Can I bake a 9-inch recipe in an 8-inch pan?
An 8″ round has about 79% of the area of a 9″ round, so the batter will be deeper. Fill no more than two-thirds full and bake 5–10 minutes longer, or use 80% of the batter.
Is an 8-inch square the same as a 9-inch round?
Nearly: 64 vs 63.6 square inches. You can swap them without changing the recipe.
How many 8-inch rounds equal a 9×13 pan?
A 9×13 pan (117 sq in) holds about the same as two 9″ rounds (127 sq in) or 2⅓ 8″ rounds.