About the Units
carat (ct)
A unit of mass equal to 200 milligrams, used for measuring gemstones and pearls.
attogram (ag)
A unit of mass equal to 10^-18 grams or 10^-21 kilograms.
Common Conversions
- 1 ct = 199999980000000000.0 ag
- 5.0000003e-18 ct = 1 ag