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Diamond Carat Size Conversion Chart

   Round  Cut

mm width

Carat Weight(cts)

mm width

Carat Weight(cts)
1.0 .005 4.8 .40
1.2 .008 4.9 .43
1.3 .01 5.0 .47
1.5 .015 5.2 1/2
1.7 .02 5.4 .60
1.8 .025 5.5 .63
2.0 .03 5.6 .65
2.1 .035 5.8 3/4
2.2 .04 6.0 .80
2.4 .05 6.2 .85
2.5 .06 6.4 .95
2.7 .07 6.5 1.00
2.8 .08 6.6 1.10
2.9 .09 6.8 1.17
3.0 1/10 7.0 1-1/4
3.1 .11 7.2 1.33
3.2 .12 7.4 1-1/2
3.3 .14 7.6 1.60
3.4 .15 7.8 1.75
3.5 .16 8.0 1.90
3.6 .17 8.2 2.00
3.7 .18 8.4 2.15
3.8 1/5 8.6 2.25
3.9 .22 8.8 2.50
4.0 .23 9.0 2.65
4.1 1/4 9.2 2.85
4.2 .30 9.4 3.00
4.4 .33 9.6 3.15
4.5 .35 9.8 3.35
4.6 1/3 10.0 3-1/2

 

   Princess Cut

mm width

Carat Weight(cts)

mm width

Carat Weight(cts)
2.0 .06 4.42 .35
2.25 .08 4.5 .40
2.5 .10 4.75 .50
2.75 .13 5.0 .63
3.0 .15 5.25 .75
3.25 .20 5.5 1.00
3.5 .23 6.0 1.25
3.75 .25 7.0 1.60
4.0 .30 8.0 2.25


   Oval  Cut

mm width

Carat Weight(cts)

mm width

Carat Weight(cts)
4 X 3 .20 8.5 x 6.5 1.50
5 X 3 .25 9 x 6 1.75
5 X 3.5 .33 9 x 7 2.00
5 X 4 .40 9.5 x 7.5 2.5
6 X 4 .50 10 x 8 3.00
6.5 X 4.5 .65 10 x 8.5 3.5
7 X 5 .75 11 x 9 4.00
7.5 X 5.5 1.00 11 x 9.5 4.50
8 X 6 1.25 12 x 10 5.00



   Pear Cut

mm width

Carat Weight(cts)

mm width

Carat Weight(cts)
4 x 2 .20 10 x 7 2.00
5 x 3 .30 12 x 7 2.50
6 x 4 .50 12 x 8 3.00
7 x 5 .75 13 x 8 3.50
8 x 5 1.00 14 x 8 4.00
9 x 6 1.50 15 x 9 5.00




   Heart  Cut

mm width

Carat Weight(cts)

mm width

Carat Weight(cts)
3.8 .20 6.0 .75
4.0 .25 6.5 1.00
4.5 .35 7.0 1.25
4.7 .40 7.5 1.50
5.0 .50 8.0 2.00
5.5 .60    


   Marquise  Cut

mm width

Carat Weight(cts)

mm width

Carat Weight(cts)
3.5 x 1.5 .07 9.5 x 4.5 .85
4 x 2 .10 10 x 4.75 1.00
5 x 2 .20 10 x 5 1.25
5 x 3 .22 11 x 5 1.50
5.5 x 2.5 .25 11 x 5.5 1.65
6 x 6 .30 12 x 6 2.00
7 x 3 .35 13 x 5.5 2.50
7 x 3.5 .38 13 x 6 2.65
7 x 4 .40 14 x 6.5 2.87
8 x 4 .50 14 x 7 3.00
8.5 x 4.5 .65 15 x 7 3.75
9 x 4 .70 16 x 8 4.50
9 x 4.5 .75 18 x 9 7.00
9 x 5 .80 20 x 10 10

   Emerald Cut

mm width

Carat Weight(cts)

mm width

Carat Weight(cts)
4 x 3 .20 8.5 x 6.5 2.00
5 x 3 .25 9 x 7 2.50
6 x 4 .50 10 x 8 3.00
6.5 x 4.5 .75 11 x 9 4.00
7 x 5 1.00 12 x 10 5.00
8 x 6 1.50    

Related Link:    Ring Size Chart  Bracelet Size Chart  Necklace Size Chart  Ear Gauge Size Chart


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