Metal Prices: Silver $17.16 Gold $1295.76Plat $975.06

Prices based on London PM Fix (Last Updated: August 20, 2017)

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Diamond Weight to mm Conversion Charts

The below charts are a helpful resource to use when estimating the measurements of the setting you should purchase based upon the cut of the diamond and its carat weight.


 

Round   Pear   Emerald
carats mm   carats mm   carats mm
0.005 1.0   0.09 3 x 2.5   0.25 5 x 3
0.007 1.2   0.12 4 x 2.5   0.50 6 x 4
0.008 1.1   0.14 2 x 3   0.75 6.5 x 4
0.010 1.3   0.16 4.5 x 3   1.00 7 x 5
0.015 1.5   0.20 5 x 3   1.50 8 x 6
0.020 1.7   0.30 5.5 x 3.5   2.00 8.5 x 6.5
0.025 1.8   0.50 6 x 4   2.50 9 x 7
0.030 2.0   0.75 7 x 5    3.00 10 x 8
0.035 2.1   1.00 8 x 5   4.00 11 x 9
0.040 2.2   1.50 9 x 6   5.00 12 x 10
0.050 2.4   2.00 10 x 7      
0.060 2.5   2.50 12 x 7   Heart
0.070 2.7   3.00 12 x 8   carats mm
0.080 2.8   3.50 13 x 8   0.12 3 x 3
0.090 2.9   4.00 14 x 8   0.20 3.5 x 3.5
0.100 3.0   4.50 14.5 x 9   0.25 4 x 4
0.110 3.1   5.00 15 x 9   0.38 4.5 x 4.5
0.120 3.2         0.50 5 x 5
0.140 3.3   Oval   0.65 5.5 x 5.5
0.150 3.4   carats mm   0.75 6 x 6
0.160 3.5   0.20 4 x 3   1.00 6.5 x 6.5
0.170 3.6   0.25 5 x 3   1.50 7 x 7
0.180 3.7   0.38 5 x 4   2.00 8 x 8
0.200 3.8   0.50 6 x 4   2.50 8.5 x 8.5
0.220 3.9   1.00 7 x 5   3.00 9 x 9
0.230 4.0   1.25 7.5 x 5.5   3.50 9.5 x 9.5
0.250 4.1   1.50 8 x 6   4.00 10 x 10
0.300 4.2   2.00 8.5 x 6.5   4.50 10.5 x 10.5
0.330 4.4   2.50 9 x 7   5.00 11 x 11
0.370 4.6   3.00 10 x 8      
0.400 4.8   3.50 10 x 8.5   Trillion
0.470 5.0   4.00 11 x 9   carats mm
0.500 5.2   4.50 11 x 9.5   0.1 3 x 3 x 3
0.600 5.4   5.00 12 x 10   0.14 3.5 x 3.5 x 3.5
0.650 5.6         0.18 4 x 4 x 4
0.750 5.8   Marquise   0.25 4.5 x 4.5 x 4.5
0.800 6.0   carats mm   0.33 5 x 5 x 5
0.950 6.4   0.035 2.5 x 1.25   0.4 5.5 x 5.5 x 5.5
1.000 6.5   0.040 3 x 1.5   0.5 6 x 6 x 6
1.100 6.6   0.060 3.5 x 1.75   1.5 7 x 7 x 7
1.170 6.8   0.070 3.5 x 2   2 8 x 8 x 8
1.250 7.0   0.090 4 x 2   2.5 9 x 9 x 9
1.330 7.2   0.110 4.25 x 2.25   3 10 x 10 x 10
1.500 7.4   0.140 4.5 x 2.5      
1.600 7.6   0.150 5 x 2.5   Princess
1.750 7.8   0.200 5 x 3   carats mm
1.900 8.0   0.250 6 x 3   0.03 1.5 x 1.5
2.000 8.2   0.300 6 x 3.5   0.04 1.75 x 1.75
2.150 8.4   0.380 7 x 3.5   0.06 2 x 2
2.250 8.6   0.500 8 x 4   0.1 2.5 x 2.5
2.500 8.8   0.750 9 x 4.5   0.14 2.75 x 2.75
2.850 9.2   1.000 10 x 5   0.17 3 x 3
3.000 9.4   1.500 11 x 5.5   0.2 3.25 x 3.25
3.150 9.6   2.000 12 x 6   0.23 3.5 x 3.5
3.350 9.8   2.500 13 x 6.5   0.3 3.75 x 3.75
3.500 10.0   3.000 14 x 7   0.38 4 x 4
3.750 10.2   3.500 14 x 7.5      
4.000 10.4   4.000 16 x 8      
4.250 10.6   5.000 16 x 8.5      
4.500 10.8            
4.750 11.0            
5.000 11.2