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