Round to Square Pan Converter
Convert recipe amounts between round and square baking pans.
Results
Converting between round and square pans is one of the most common baking adjustments. The key is comparing the area of each pan - a 9-inch round pan has about 63.6 square inches while an 8-inch square pan has 64 square inches, making them nearly interchangeable. For other sizes, the ratio matters more.
Explore all our pan size converter tools, or browse the full cooking hub.
Frequently asked questions
Yes, an 8-inch square pan (64 sq in) is almost identical in area to a 9-inch round pan (63.6 sq in). No recipe adjustment needed.
A 10-inch round pan has 78.5 sq in. The closest square pan is 9 inches (81 sq in), which is close enough for most recipes.
Square pans have corners that bake faster, so check corners 5 minutes early. Overall baking time stays roughly the same if the pan areas are similar.
Yes, if you are changing pan depth the batter height changes even if the area is the same. Fill pans no more than 2/3 full to prevent overflow.
A 9x13 pan has 117 sq in, nearly double a 9-inch round (63.6 sq in). You would need to double the recipe to fill a 9x13.