Swapping a recipe from one pan to another changes how much batter fits and how the bake behaves, so this tool compares the two pans by surface area and tells you the scale factor to apply. Pick your original pan shape and size, then the pan you actually own, and it computes the area of each (a round pan uses pi times radius squared, a rectangle uses length times width) and divides them. Multiply your recipe by that factor to keep the batter depth roughly the same, which keeps baking times sensible. Depth matters too, so if your new pan is much shallower or deeper, adjust the oven time and check doneness early. This is a guide based on area, not a guarantee, since every recipe rises differently. It all runs locally in your browser.
It compares the area and volume of your original pan with a different pan so you can scale the batter to fill it correctly.
Batter depth depends on area, so switching to a larger or smaller pan without adjusting the amount leads to over or underfilling and changed bake times.
You can compare round and rectangular pans by their measured dimensions to find the right scaling factor.
Swapping a recipe from one pan to another changes how much batter fits and how the bake behaves, so this tool compares the two pans by surface area and tells you the scale factor to apply. Pick your original pan shape and size, then the pan you actually own, and it computes the area of each (a round pan uses pi times radius squared, a rectangle uses length times width) and divides them.
Yes. Baking Pan Size Converter is completely free, with no sign-up and no usage limits.
Yes. Baking Pan Size Converter runs in any modern web browser. There is nothing to download or install.
Yes. Baking Pan Size Converter runs entirely on your device in your browser, so nothing you enter is uploaded to a server.