About the Units
grain (gr)
A unit of mass equal to 64.79891 milligrams, originally based on the weight of a grain of barley.
microgram (µg)
A unit of mass equal to 10^-6 grams or 10^-9 kilograms.
Common Conversions
- 1 gr = 64798.91 µg
- 0.000015432359 gr = 1 µg