Carat to MM Conversion is a simple tool that helps to approximately determine the diamond size on the fingers. Here is the table listing the 'carat size to millimeter' for fancy diamond cuts. Check out here for the equivalent carat to mm size for Brilliant Cut, Princess Cut, Marquise Cut, Oval Cut, Pear Cut and Emerald Cut. For example, here the dimensions of a 0.07 carat Marquise Cut is equal to 4 X 2mm. This helps to compute and predict the size of 0.07 carat Marquise Cut. You can refer the below chart for different diamond cuts.
| Brilliant Cut | Princess Cut | Marquise Cut | Oval Cut | Pear Cut | Emerald Cut |
| 0.06-0.08cts = 2.5mm | 0.06-0.08cts = 2.1-2.2mm | 0.07ct = 4X2mm | 0.15-0.18ct = 4X3mm | 0.15-0.18ct = 4.5X3mm | 0.25ct = 4X3mm |
| 0.10-0.12cts = 3mm | 0.10-0.12cts = 2.5-2.7mm | 0.15ct = 5X2mm | 0.25ct = 5X3mm | 0.25ct = 5X3.5mm | 0.35ct = 5X3mm |
| 0.16-0.18cts = 3.5mm | 0.16-0.18cts = 3mm | 0.20ct = 5X3mm | 0.40ct = 5X4mm | 0.35ct = 5.75X4mm | 0.40ct = 5X3.5mm |
| 0.20-0.22cts = 3.8mm | 0.20-0.22cts = 3.2-3.3mm | 0.25ct = 6X3mm | 0.50ct = 6X4.5mm | 0.40ct = 6X4mm | 0.50ct = 5X4mm |
| 0.24-0.26cts = 4mm | 0.24-0.26cts = 3.4-3.5mm | 0.35ct = 6.5X3.5mm | 0.65ct = 6.5X4.5mm | 0.50ct = 6.5X4.5mm | 0.60ct = 6X3mm |
| 0.27-0.29cts = 4.2mm | 0.27-0.29cts = 3.5mm | 0.35ct = 7X3mm | 0.75ct = 7X5mm | 0.75ct = 7X5mm | 0.70ct = 6X4mm |
| 0.30-0.35cts = 4.5mm | 0.30-0.35cts = 3.8-3.9mm | 0.40ct = 6.5X4mm | 1.00ct = 7.5X5.5mm | 1.00ct = 8X5mm | 0.80ct = 6.5X4.5mm |
| 0.36-0.38cts = 4.6mm | 0.36-0.38cts = 3.8-3.9mm | 0.50ct = 7X4.5mm | 1.25ct = 8X6mm | 1.50ct = 9X6mm | 0.95ct = 7X4mm |
| 0.39-0.43cts = 4.7-4.8mm | 0.39-0.43cts = 3.9-4.1mm | 0.70ct = 8X5mm | 1.50ct = 8.5X6.5mm | 1.00ct = 7X5mm | |
| 0.44-0.47cts = 4.8-4.9mm | 0.44-0.47cts = 4.1-4.3mm | 0.70ct = 9X4mm | 1.75ct = 9X6mm | 1.25ct = 7.5X5.5mm | |
| 0.48-0.52cts = 5mm | 0.48-0.52cts = 4.3-4.5mm | 0.75ct = 9X4.5mm | 2.00ct = 9X6mm | 1.50ct = 8X5mm | |
| 0.53-0.59ctsct = 5.2mm | 0.53-0.59ctsct = 4.6mm | 0.80ct = 9X5mm | 2.00ct = 8.5X6.5mm | ||
| 0.60-0.62cts = 5.3-5.4mm | 0.60-0.62cts = 4.7mm | 1.00ct = 9X6mm | 2.25ct = 9X6mm | ||
| 0.63-0.68ctsct = 5.5-5.6mm | 0.63-0.68ctsct = 4.8mm | 2.50ct = 9X7mm | |||
| 0.69-0.74cts = 5.6-5.8mm | 0.69-0.74cts = 4.8-4.9mm | ||||
| 0.75-0.80cts = 5.9-6mm | 0.75-0.80cts = 4.9-5mm | ||||
| 0.90-0.92cts = 6.2-6.3mm | 0.90-0.92cts = 5.1-5.2mm | ||||
| 0.93cts-0.99cts = 6.3-6.4mm | 0.93cts-0.99cts = 5.2-5.3mm | ||||
| 1.0cts-1.05cts = 6.4-6.5mm | 1.0cts-1.05cts = 5.3-5.5mm | ||||
| Approx 1.1cts = 6.6mm | Approx 1.1cts = 5.8mm | ||||
| Approx 1.25cts = 6.8-6.9mm | Approx 1.25cts = 6mm | ||||
| Approx 1.3cts = 7mm | Approx 1.3cts = 6.1mm | ||||
| Approx 1.4cts = 7.2-7.3mm | Approx 1.4cts = 6.2mm | ||||
| Approx 1.5cts = 7.5mm | Approx 1.5cts = 6.4mm | ||||
| Approx 1.75cts = 7.7-7.8mm | Approx 1.75cts = 6.6-6.8mm | ||||
| Approx 2cts = 8-8.2mm | Approx 2cts = 7mm |
Carat to MM conversion values usually expressed in terms of decimals. The carat weight chart shows the equivalent millimeter size of the diamond cuts. Carat weight should be taken along with a distance in millimeters to find the diamond's cut.
