pan diameter single area double area # standard recipes 8-9 equivalent
8 42π = 50 100 1
9 4.52π = 64 128 1
12 62π = 113 226 2 200-256
14 72π = 154 308 3 300-384
12 X 18 sheet 216 - 2 200-256
9 X 13 pan 117 - 1 100-128



cupcakes: 1 ordinary cake recipe (two 8-9" layers) ≈ 21 cupcakes