About the Units
grain (gr)
A unit of mass equal to 64.79891 milligrams, originally based on the weight of a grain of barley.
zettagram (Zg)
A unit of mass equal to 10^21 grams or 10^18 kilograms.
Common Conversions
- 1 gr = 6.47989e-23 Zg
- 1.543236e22 gr = 1 Zg