About the Units
femtogram (fg)
A unit of mass equal to 10^-15 grams or 10^-18 kilograms.
hundredweight (long) (cwt long)
A unit of mass equal to 112 pounds or approximately 50.8 kilograms, used in the imperial system.
Common Conversions
- 1 fg = 1.968413e-20 cwt long
- 50802345000000000000.0 fg = 1 cwt long