Conversor de Forma de Bolo
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
V_redonda = π×r²×h | V_retang = c×l×h | escala = V2/V1
About this calculator
The Cake Pan Converter is a practical tool for adjusting recipes when changing the size or shape of your baking pan. When substituting a round pan for a square one, or vice versa, the amount of batter must be adjusted to maintain ideal texture and baking time. The calculator uses pan volume as the basis: for round pans, it calculates π × radius² × height; for rectangular or square pans, length × width × height. The conversion factor is the division of the new pan's volume by the original pan's volume.
This tool is useful in many everyday situations. For example, if a recipe calls for a 20 cm round pan and you only have an 18 cm square pan, the converter will indicate the percentage adjustment for ingredients. It also helps when increasing or decreasing pan size within the same shape, ensuring the batter does not overflow or become too thin. Additionally, bakeries often adapt recipes for different pan sizes, and the calculator provides precision to avoid waste.
When using the converter, consider that pan height directly affects volume. If the new pan has a different height, measure and input the correct value. Another caution: the calculator assumes batter fills the pan evenly, but very liquid or leavened recipes may behave differently. It is also recommended to adjust oven time, as larger or shallower pans may cook faster. The tool is a reliable guide, but kitchen experience is key to the final result.
Frequently asked questions
How do I measure the radius of a round pan?
Measure the diameter of the pan (the total width) and divide by two. For example, if the pan is 20 cm in diameter, the radius is 10 cm.
Do I need to enter the pan height?
Yes, height is essential for volume calculation. If the new pan has a different height, the conversion factor will change.
Does the converter work for silicone pans?
Yes, as long as you measure the internal dimensions of the silicone pan. The material does not affect volume calculation.
What if my pan is oval or another shape?
For non-standard shapes, approximate to the closest shape (round or rectangular) and measure the main dimensions. The result will be an estimate.
Does the calculator adjust baking time?
No, the converter only adjusts ingredient amounts. Baking time may vary; it is recommended to check for doneness a few minutes before the original time.