Millimeter To Carat Conversion | Gemstone Weight Conversion Charts | Esslinger.com | Esslinger Watchmaker Supplies Blog
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Posted by Esslinger Staff

 
Below is a chart that will help you approximate diamond weight for 3 popular cuts including round, square and oval. Although weighing the stone on a good gemstone scale is the only way to get an exact weight, this chart can give you a good idea what the stone may weigh.

 
Round Square Oval     
Size (mm)Weight (carats)Size (mm)Weight (carats)Size (mm)Weight (carats)
1.60.0250.755 x 30.25
20.0361.36 x 40.5
2.50.0672.057 x 51
30.182.98 x 61.5
3.50.1694.49 x 72.5
40.2510610 x 83
4.50.3311811 x 94
50.51210.3512 x 105
5.50.651313.214 x 106
60.751416.514 x 128
6.511520.2516 x 1210.5
71.251624.618 x 1314.2
8220 x 1520.3
92.7522 x 1523.5
103.523 x 1732.2
114.625 x 1843
12627 x 2058.5
137.7530 x 2279.6
149.65
1511.85
1614.35
1717.25
1820.5
1924
2028
2134.8
2241.8
2349.8
2457.9
2568.7

 

 

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