Princess Cut
0.005ct
0.01ct
0.015ct
0.02ct
0.03ct
0.04ct
0.06ct
0.07ct
0.10ct
0.12ct
0.16ct
0.18ct
0.25ct
0.30ct
0.35ct
0.38ct
0.40ct
0.50ct
0.60ct
0.75ct
1.00ct
1.25ct
1.50-1.75ct
2.00ct
2.50-3.00ct
1mm
1.25mm
1.5mm
1.7mm
2mm
2.2mm
2.5mm
2.7mm
3mm
3.2mm
3.5mm
3.7mm
4mm
4.2mm
4.5mm
4.6mm
4.8mm
5mm
5.4mm
6mm
6.6mm
7mm
7.5mm
8mm
9mm
0.06ct
0.08ct
0.10ct
0.13ct
0.15ct
0.20ct
0.23ct
0.25ct
0.30c
0.35ct
0.40ct
0.50ct
0.63t
0.75ct
1.00ct
1.25ct
1.60ct
2.25ct
2mm
2.25mm
2.5mm
2.27mm
3mm
3.25mm
3.5mm
3.75mm
4mm
4.42mm
4.5mm
4.75mm
5mm
5.25mm
5.5mm
6mm
7mm
8mm
Oval Cut
Emerald Cut
0.07ct
0.10ct
0.20ct
0.20-0.25ct
0.25ct
0.30ct
0.35ct
0.38ct
0.40ct
0.50ct
0.65ct
0.70ct
0.75ct
0.80ct
0.85ct
1.00ct
1.00-1.25ct
1.50ct
1.50-1.75ct
2.00ct
2.50ct
2.50-2.75ct
2.75-3.00ct
3.00ct
4ct
3.5x1.5mm
4x2mm
5x2mm
5x3mm
5.5x2.5mm
6x3mm
7x3mm
7x3.5mm
7x4mm
8x4mm
8.5x4.5mm
9x4mm
9x4.5mm
9x5mm
9.5x4.5mm
10x4.75mm
10x5mm
11x5mm
11x5.5mm
12x6mm
13x5.5mm
13x5.5mm
13x6mm
14x7mm
15x7mm
0.20ct
0.25ct
0.50ct
0.75ct
1.00ct
1.50ct
2.00ct
2.50ct
3.00ct
4.00ct
5.00ct
4x3mm
5x3mm
6x4mm
6.5x4.5mm
7x5mm
8x6mm
8.5x6.5mm
9x7mm
10x8mm
11x9mm
12x10mm
Carat to Millimeter size conversion
Please use this as a guide to compare a diamond's carat weight to its approximate mm dimensions.
Please note this is only a rough guide as the weight of the stone will vary depending upon its depth and the way it has been cut.
Brilliant Cut
0.20ct
0.25ct
0.33ct
0.40ct
0.50ct
0.65ct
0.75ct
1.00ct
1.25ct
1.50ct
1.75ct
2.00ct
2.50ct
3.00ct
3.50ct
4.00ct
4.50ct
5.00ct
4x3mm
5x3mm
5x3.5mm
5x4mm
6x4mm
6.5x4.5mm
7x5mm
7.5x5.5mm
8x6mm
8.5x6.5mm
9x6mm
9x7mm
9.5x7.5mm
10x8mm
10x8.5mm
11x9mm
11x9.5mm
12x10mm
