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