Millimeters to Carat Conversion Chart
Do you want to know the millimeter or carat size of a gemstone such as a diamond or sapphire? The Millimeters to Carat Conversion Chart below converts a gemstones from millimeters (mm) to carat weight size.
| Millimeter Size (mm) | Carat Weight Size |
| 1mm | .005 carat |
| 1.25 | .009 carat |
| 1.5 | .015 carat |
| 2mm | .03 carat |
| 2.5mm | .06 carat |
| 3mm | .10 carat |
| 3.5mm | .16 carat |
| 4mm | .25 carat |
| 4.5mm | .33 carat |
| 5mm | .50 carat |
| 5.5mm | .65 carat |
| 6mm | .75 carat |
| 6.5mm | 1.0 carat |
| 7mm | 1.25 carat |
| 8mm | 2.0 carat |
| 9mm | 2.75 carat |
| 10mm | 3.5 carat |
| 11mm | 4.6 carat |
| 12mm | 6.0 carat |
| 13mm | 7.75 carat |
| 14mm | 9.65 carat |
| 15mm | 12.89 carat |