Conversion charts to show the comparison between mm & carat

Carat is the standard unit used to measure a diamond’s weight, not its size. While two diamonds may have the same carat weight, their dimensions can appear different depending on how they are cut. A well-cut diamond will reflect light better and appear larger than a poorly cut one of the same weight. View the charts below to compare millimeter-to-carat conversions for various stone shapes and sizes.