9 x 13" rectangle to 9" round
| Recipe pan | Your pan | |
|---|---|---|
| Pan | 9 x 13" rectangle | 9" round |
| Area | 117 sq in | 63.6 sq in |
| Capacity | 16.2 cups | 8.8 cups |
| Multiply by | 0.54 |
- Half a 9x13 recipe is a common trap. Eggs do not halve cleanly. At 0.54 times a 3 egg recipe, you need 1 1/2 eggs: beat one extra egg and use half of it.
- Two 9 inch rounds are 127 square inches, so a full 9x13 recipe fits with a little room. Set "Number of pans" to 2 on the pan you will use to see the exact factor.
- The batter is the same depth, so keep the oven temperature and check at about the recipe time.
Example: a plain butter cake
This is a sample ingredient list scaled for this swap. Paste your own recipe in the tool above to scale it.
| Recipe says | Use |
|---|---|
| 2 cups all-purpose flour | 1 1/8 cups all-purpose flour |
| 1 1/2 cups sugar | 7/8 cup sugar |
| 1/2 cup (1 stick) butter | 1/4 cup (1/2 stick) butter |
| 3 large eggs | 1 1/2 large eggs |
| 3/4 cup milk | 3/8 cup milk |
| 2 tsp baking powder | 1 1/8 tsp baking powder |
Bake time and temperature
For a recipe that bakes 35 minutes at 350°F: start checking at 33 minutes and expect it done by 37, at 350°F.
The batter depth is close to the recipe pan. Keep the same oven temperature and check at about the same time.
Fill any pan no more than two thirds full. Bake leftover batter as cupcakes.
Questions about this swap
How much batter does a 9 inch round hold compared with a 9x13?
About 54%. A 9x13 holds 117 square inches and a 9 inch round holds 63.6. The depth is the same, so the ratio is the same by volume.
Can I bake a full 9x13 recipe in one 9 inch round?
No. The batter would overflow. Use 0.54 times the recipe, or split a full recipe between two 9 inch rounds.