Recipe conversions between different size cake pans

 
 
 
 
 
 
 
 
 
 
 
 
 
 
inch
cm
10 cm
4 in
12 cm
5 in
15 cm
6 in
7 in
18 cm
8 in
21 cm
9 in
 
3.94
10
 
 
 
 
 
 
 
 
 
 
 
 
4
10.16
1.03
 
 
 
 
 
 
 
 
 
 
 
4.72
12
1.44
1.40
 
 
 
 
 
 
 
 
 
 
5
12.7
1.61
1.56
1.12
 
 
 
 
 
 
 
 
 
5.91
15
2.25
2.18
1.56
1.40
 
 
 
 
 
 
 
 
6
15.24
2.32
2.25
1.61
1.44
1.03
 
 
 
 
 
 
 
7
17.78
3.16
3.06
2.20
1.96
1.41
1.36
 
 
 
 
 
 
7.09
18
3.24
3.14
2.25
2.01
1.44
1.40
1.02
 
 
 
 
 
8
20.32
4.13
4.00
2.87
2.56
1.84
1.78
1.31
1.27
 
 
 
 
8.27
21
4.41
4.27
3.06
2.73
1.96
1.90
1.40
1.36
1.07
 
 
 
9
22.86
5.23
5.06
3.63
3.24
2.32
2.25
1.65
1.61
1.27
1.18
 
 
9.45
24
5.76
5.58
4.00
3.57
2.56
2.48
1.82
1.78
1.40
1.31
1.1
 

 

Examples: 

  • Recipe given for 6″ pie plate.  Want to convert into 9″ pie plate recipe:  find the intersection of row 9 in and column 6 in, which is 2.25.  You can multiply the original recipe quantities by 2.25.
  • Recipe given for 9″ cake mold.  Want to convert into 6″ pie plate recipe: do the same as above and get the ration 2.25.  You will divide the original recipe quantities by 2.25.
  • Recipe given for 18 cm round cake pan.  Want to convert into 9 in cake pan.  Find the intersection of 18cm and 9in, which is 1.61.  You can multiply the original recipe quantities by 1.61.

This conversion table is only valid when the height of different sized pans are equal.   For example, usual US round cake mold has  2 in  in height/depth.  And Japanese round cake mold has 5 cm (about 2 inches) height/depth – so about the same. 

If the heights are different, you should actually measure the maximum volume that each container can hold, then get the ratio.  The easiest is to fill each containers with water and measure the volume or weight.

Or you can mathematically calculate the volumes of the two cake pans and get the ratio.  Round cake mold’s volume: Pi*r^2*h,  Square or Rectangular cake mold: w*l*h, as you know.  It is a good idea to make your own conversion table for reference.

Above conversion table is only for estimation; trials and error is required to get the optimum conversion ratio.

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