About the Units
gigagram (Gg)
A unit of mass equal to 10^9 grams or 10^6 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 Gg = 15432359000.0 gr
- 6.479891e-11 Gg = 1 gr