9 x 13" rectangle to 8" round (2 pans)
| Recipe pan | Your pan | |
|---|---|---|
| Pan | 9 x 13" rectangle | 8" round (2 pans) |
| Area | 117 sq in | 100.5 sq in |
| Capacity | 16.2 cups | 13.9 cups |
| Multiply by | 0.86 |
- You will have less batter than the 9x13 recipe makes, so cut each amount by about 14%. If that is awkward, use the full recipe and bake the extra batter as 2 or 3 cupcakes.
- Weigh the batter into each pan, or use a scale, so both layers match. Uneven layers bake at different speeds.
- The batter is the same depth, so keep the oven at the recipe temperature. Thin layers can finish a little early, so start checking 3 to 5 minutes before the recipe time.
- Going the other way, a recipe for two 8 inch rounds fits a 9x13 pan at 1.16 times the batter.
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 3/4 cups all-purpose flour |
| 1 1/2 cups sugar | 1 1/4 cups sugar |
| 1/2 cup (1 stick) butter | 3/8 cup (3/4 stick) butter |
| 3 large eggs | 2 1/2 large eggs |
| 3/4 cup milk | 5/8 cup milk |
| 2 tsp baking powder | 1 3/4 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
Can I use two 8 inch rounds for a 9x13 cake recipe?
Yes. Multiply the recipe by 0.86 and divide the batter between the two pans. If you do not want to cut every amount, use the full recipe and bake the extra as cupcakes.
How long do two 8 inch layers bake compared with a 9x13?
The batter is the same depth, so the time is close to the same. For a recipe that says 35 minutes, start checking at about 33 and use a toothpick.