Cake Pans Converter
Convert cake pan sizes between round and rectangular pans. Calculate volume ratios and adjust recipe ingredients for any pan size. Free cake pan converter with charts.
About This Calculator
Have you ever found a perfect cake recipe only to realize your cake pan is a different size than what the recipe calls for? Our Cake Pans Converter solves this problem instantly. Whether you are converting a 9-inch round recipe to an 8-inch square pan, scaling a 13x9 sheet cake down to a loaf pan, or mixing shapes entirely, this tool computes the exact volume ratio you need.
The calculator works by computing the volume of each pan using standard geometric formulas. For round pans it uses the cylinder formula (π × r² × height) and for rectangular pans it uses length × width × height. The ratio of your pan's volume to the recipe pan's volume is then applied to each ingredient, ensuring your batter proportions remain correct regardless of pan shape or size. You can optionally enter any ingredient amount from the original recipe to see the exact adjusted quantity needed for your pan.
Regional Notes
Worldwide: Cake pan sizes are typically measured in inches (US) or centimeters (UK/IN). Enter dimensions in inches for standard US recipes or convert cm to inches (divide by 2.54) for metric recipes. The volume ratio works the same regardless of the unit system used.
India: Home bakers in India often use a mix of metric and imperial pans. Common pan sizes include 8-inch and 9-inch round tins. If using centimeters, divide by 2.54 to get inches before entering values.
United States: Standard pan sizes include 8-inch and 9-inch round, 13x9x2 inch rectangular, 9x5 inch loaf, and 8x8 inch square pans. Most US recipes specify pan dimensions in inches.
United Kingdom: UK bakers commonly use 20 cm (8 inch) and 23 cm (9 inch) round tins. Convert cm measurements to inches (divide by 2.54) when entering values into the calculator.
Frequently Asked Questions
How do I convert a cake recipe to a different pan size?
Measure your cake pan dimensions, calculate its volume, and divide by the volume of the pan in the original recipe. This gives you the adjustment ratio. Multiply each ingredient amount by this ratio to get the correct quantities for your pan.
How do I calculate the volume of a round cake pan?
For a round cake pan, use the formula for the volume of a cylinder: V = π x r² x h, where r is half the diameter and h is the height. For example, a 9-inch round pan that is 2 inches tall has a volume of approximately 127 cubic inches.
How do I calculate the volume of a rectangular cake pan?
For a rectangular pan, multiply length x width x height. For example, a 13x9x2 inch pan has a volume of 234 cubic inches, which is nearly double that of a standard 9-inch round pan.
Can I convert between round and rectangular pans?
Yes, this calculator supports all combinations of shapes. Select the shape of the recipe pan and your pan independently, enter the dimensions, and the tool will compute the volume ratio regardless of shape differences.
Does the adjustment ratio work for all ingredients?
Yes, the volume ratio applies to all ingredients equally. However, baking time may need adjustment. A larger pan with more batter may require longer baking, while a smaller pan may need less time. Always check doneness with a toothpick or cake tester.
How do I measure my cake pan size?
Use a ruler to measure the distance between the two opposite inner edges of the pan. For round pans, measure across the widest point (the diameter). For rectangular pans, measure both the length and width. Measure height from the bottom to the top rim.
What if my pan is a different height than the recipe?
This calculator takes pan height into account for both pans. If your pan is taller or shorter than the recipe pan, the volume calculation will reflect that difference. Just enter the actual height of each pan to get an accurate adjustment ratio.
Is this cake pan converter free to use?
Yes, it is completely free to use with no registration or hidden charges. The URL saves your inputs so you can bookmark or share the exact calculation with others.