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 |
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