pan diameter
single area
double area
# standard recipes
8-9 equivalent
8
4
2
π = 50
100
1
9
4.5
2
π = 64
128
1
10
5
2
π = 78.5
157
1.5
150-192
12
6
2
π = 113
226
2
200-256
14
7
2
π = 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