About the Units
carat (ct)
A unit of mass equal to 200 milligrams, used for measuring gemstones and pearls.
grain (gr)
A unit of mass equal to 64.79891 milligrams, originally based on the weight of a grain of barley.
Common Conversions
- 1 ct = 3.0864718 gr
- 0.32399455 ct = 1 gr