how many kg in a gram
1 Grams is equal to 0.001 Kilograms. 1 g = 0.001 kg. The gram is a unit of mass. A gram is defined as one 1000 of the SI base unit the kilogram which itself is defined as being equal to the mass of a physical prototype preserved by the International Bureau of Weights and Measures. The kilogram or kilogramme (symbol: kg) is the SI base unit of mass.