About the Units
carat (ct)
A unit of mass equal to 200 milligrams, used for measuring gemstones and pearls.
femtogram (fg)
A unit of mass equal to 10^-15 grams or 10^-18 kilograms.
Common Conversions
- 1 ct = 199999980000000.0 fg
- 5.0000003e-15 ct = 1 fg