A cake pan converter lets you swap between pan sizes without guessing at proportions or baking times. Different pan dimensions hold different volumes of batter — a 9-inch round holds about 8 cups while a 9×13 holds 14 cups. Scaling up or down changes batter depth, which directly affects how long your cake needs to bake.
Original Pan
Target Pan
Conversion Results
The 9×13 pan holds more batter in a thinner layer — bake at the same temperature but start checking 5–10 minutes early.
Common Pan Volumes
| Pan | Area (sq in) | Volume (cups) |
|---|---|---|
| 6-inch round | 28 | 4 |
| 8-inch round | 50 | 6 |
| 9-inch round | 64 | 8 |
| 10-inch round | 79 | 10–11 |
| 8×8 square | 64 | 8 |
| 9×9 square | 81 | 10 |
| 9×13 rect | 117 | 14 |
| Bundt (standard) | — | 12 |
| 9×5 loaf | 45 | 8 |
How to Use the Cake Pan Converter
The cake pan converter calculates the scaling factor and adjusted baking time when you substitute one pan size for another. Changing pan dimensions affects both the amount of batter and the depth of the layer, which determines how long the cake needs to bake.
Step 1: Select Your Original Pan
Choose the pan type and size specified in your recipe. Common options include round (8-inch, 9-inch), square (8×8, 9×9), rectangular (9×13), and specialty pans like Bundt or loaf.
Step 2: Choose Your Target Pan
Select the pan you actually have on hand. The calculator computes the volume ratio between the two pans.
Step 3: Enter Original Baking Time
Input the baking time from your recipe. The tool adjusts this based on the depth difference between pans — a thinner batter layer bakes faster; a deeper layer takes longer.
Understanding the Results
The scaling factor tells you how much to multiply each ingredient. A factor of 1.83 means you need 83% more of everything. Always start checking for doneness a few minutes before the estimated time using a toothpick or cake tester. Keep oven temperature the same — only time changes with pan size.
FAQ
How do I convert a 9-inch round recipe to a 9x13 pan?
A 9-inch round pan holds about 64 sq in of batter vs 117 sq in for a 9x13. That's a 1.83x scale factor. Use more batter and reduce baking time by 20-25% since the batter layer is thinner in the larger pan.
Does changing pan size affect baking time?
Yes. A thicker layer of batter takes longer to bake; a thinner layer bakes faster. Use this calculator to get an adjusted time estimate. Always start checking 10 minutes early with a toothpick.
Can I use a springform pan instead of a regular round?
Yes — they have the same capacity per diameter. A 9-inch springform equals a 9-inch round. The main difference is springforms allow easy removal for cheesecakes and layer cakes.
How do I know which pan is larger by volume?
Volume depends on both base area and depth. A 9x13 pan at 2 inches deep holds about 14 cups; a 9-inch round at 2 inches deep holds about 8 cups. This calculator computes exact volumes based on standard pan depths.
Is this calculator free to use?
Yes, completely free with no signup or account required. All calculations run in your browser.