Compare pan surface area and estimate how much to scale a recipe for a different baking pan.
Enter the original pan shape and dimensions followed by the new pan dimensions, then calculate the recipe multiplier based on pan area.
Pan depth and desired cake thickness matter as well as surface area.
This converter compares the surface area of the original pan with the surface area of the replacement pan. The resulting ratio tells you approximately how much batter or mixture is needed to keep a similar depth. It also helps when moving between round, square and rectangular pans where simply comparing widths is misleading.
Two pans can have similar surface area but different wall height, material or heat conduction. A deeper layer of batter can take longer to bake and may need a lower temperature to cook evenly; a shallower layer may finish sooner. Leave enough headroom for cakes that rise, and avoid overfilling a pan just because the area calculation says the volume is close. Use the multiplier for ingredient planning and check doneness earlier when the final batter depth differs from the original recipe.