Effortlessly convert millimeters (mm) to carats for diamonds, gemstones, and pearls. Use our MM to Carat Calculator to quickly estimate the weight of your precious stones based on their dimensions and specific gravity. Perfect for jewelers, appraisers, and enthusiasts needing accurate conversions for various cuts, including round brilliant cut diamonds.
Formula:
The estimated carat weight (Carats) is calculated using the following formula:
Carats = (Dmm2 × Hmm × SG) / 5000
Where:
Dmm = Average Diameter in millimeters
Hmm = Depth/Height in millimeters
SG = Specific Gravity of the gemstone (e.g., 3.52 for Diamond, 4.0 for Ruby/Sapphire)