About the Units
grain (gr)
A unit of mass equal to 64.79891 milligrams, originally based on the weight of a grain of barley.
nanogram (ng)
A unit of mass equal to 10^-9 grams or 10^-12 kilograms.
Common Conversions
- 1 gr = 64798908.0 ng
- 1.543236e-8 gr = 1 ng