Carat Weight Converter
Convert carats into any other weight unit. The metric carat is exactly 200 mg and is used for the weight of gemstones.
Convert carats
Frequently Asked Questions
Exactly 200 milligrams, or 0.2 g, by international agreement since 1907.
No, and they are easy to confuse. Carat is the weight of a gemstone. Karat, spelled with a K in the US, is the purity of gold out of 24.
Five.
For the same cut and material, yes, but weight is not diameter: a deeper cut puts weight where it is not visible from above.