How to Use the Cake Pan Converter
Have you ever come across a recipe you'd love to try, but found that you don't have the right cake pan size? With this cake pan converter, this will never be a problem again! Using our tool is a piece of cake 🍰: input the size and shape of the recipe's baking pan, enter the dimensions of your own pan, and you'll get the conversion ratio in the blink of an eye.
In the second part of the calculator, you can enter the cake's ingredients and how much of them are needed in the original recipe — we'll recalculate all the amounts for you automatically.
You can also find tips on adjusting baking time for different pan sizes at the bottom of your results.
How to Convert Pan Sizes: Round ○ ⇨ Round ◯, Round ◯ ⇨ Rectangular 🟥
Imagine this situation: it's a lazy Saturday morning, you're scrolling through social media, and a tempting chocolate cake appears on your feed. But unfortunately, all you have is a rectangular 7 × 11 × 2 inch pan, while the recipe calls for a round 6-inch cake pan. So what do you do?
- Input the recipe pan size. Choose the round shape and enter 6 inches as the diameter. If you know the pan height, enter it too — let's say 2 inches.
- Set your pan dimensions. Choose the rectangular shape and enter 7 and 11 as the pan sides. Keep the height at 2 inches (same as the recipe).
- Read the conversion ratio. In this example, the ratio is approximately 2.72 — meaning you need 272% of the ingredients listed in the original recipe. Multiply each amount by this ratio and you're ready to bake!
The calculator compares areas when both pans have the same height, or volumes when the heights differ — giving you the most accurate scaling possible.
Baking Pan Sizes
Baking pans come in a wide variety of shapes and sizes. Here are some standard pan dimensions and their approximate volumes:
| Pan Type | Dimensions (inches) | Dimensions (cm) | Approx. Volume |
|---|---|---|---|
| Round | 6 × 2 in | 15 × 5 cm | ~4 cups / 950 ml |
| Round | 8 × 2 in | 20 × 5 cm | ~8 cups / 1.9 L |
| Round | 9 × 2 in | 23 × 5 cm | ~10 cups / 2.4 L |
| Round | 10 × 2 in | 25 × 5 cm | ~12 cups / 2.8 L |
| Square | 8 × 8 × 2 in | 20 × 20 × 5 cm | ~8 cups / 1.9 L |
| Square | 9 × 9 × 2 in | 23 × 23 × 5 cm | ~10 cups / 2.4 L |
| Rectangular | 9 × 13 × 2 in | 23 × 33 × 5 cm | ~14 cups / 3.3 L |
| Rectangular | 7 × 11 × 2 in | 18 × 28 × 5 cm | ~10 cups / 2.4 L |
| Rectangular (loaf) | 9 × 5 × 3 in | 23 × 13 × 7.5 cm | ~8 cups / 1.9 L |
How to Adjust Baking Time for Different Pan Sizes
When you change pan size, the batter depth changes, which affects baking time and temperature. Here are the general rules:
- Larger pan (ratio > 1.15): The batter layer is thinner. Check for doneness earlier than the recipe suggests. For ratio ≥ 1.5, consider reducing the oven temperature by 25°F (15°C) to prevent overbrowning, and increase baking time by 20–25%.
- Smaller pan (ratio < 0.87): The batter is deeper. The cake will need more time to bake through. For ratio ≤ 0.67, consider increasing oven temperature by 25°F (15°C) and reducing baking time by 20–25%.
- Similar size (ratio 0.87–1.15): Use the same baking time and temperature as the recipe.
Always use the toothpick or skewer test to check doneness regardless of pan size: insert it into the center — if it comes out clean, the cake is done!
American vs. Metric Measurements
This calculator supports both American (imperial) and metric measurement systems:
- Imperial: dimensions in inches (in)
- Metric: dimensions in centimeters (cm)
Standard US pan sizes are typically expressed in inches, while European recipes often use centimeters. Simply select your preferred system at the top of the calculator.
FAQs
- Can I substitute a round pan for a square one?
- Yes! A round 9-inch pan and a square 8×8-inch pan have very similar areas (~64 in² vs ~63.6 in²), making them nearly interchangeable. Use the calculator to get the exact ratio.
- What if I'm using a springform pan?
- Springform pans are measured by diameter just like regular round pans. Select "Round" and enter the diameter.
- Can I use this for bread or brownies?
- Absolutely! The pan area/volume ratio works for any batter-based baked good. Just keep in mind that very different depths will require baking time adjustments.
- What about bundt pans or tube pans?
- Bundt and tube pans have a hollow center, so their effective area is less than a solid round pan of the same diameter. As a rough guide, treat a 10-inch bundt pan as equivalent to two 9-inch round pans.
- My ratio shows 1.27 — how do I scale ingredients?
- Simply multiply every ingredient amount by 1.27. For example, if the recipe calls for 2 cups of flour, you'll need 2 × 1.27 = 2.54 cups. Use the ingredient scaling section in the calculator to do this automatically!