1,000 grams is one kilogram in the International System of Units (SI). The kilo prefix means one thousand, so a thousand grams is a kilogram. Originally defined as the mass of a cubic decimeter (liter) of water, the kilogram is today standadized as the mass of a platinum-iridium international prototype kept at the International Bureau of Weights and Measures (Bureau International des Poids et Mesure, near Paris, France). A one-kilogram mass has an Earth weight of about 2.2 pounds.
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There are 1000 grams in one kilogram. Therefore, 650 grams is equal to 650/1000 = 0.65 kilograms.
One million grams is equal to one (metric) tonne. There are 1000 grams in 1 kilogram and 1000 kg in 1 tonne.
There are 1000 milligrams in one grams. Therefore, 65 grams is equal to 65 x 1000 = 65000 milligrams.
1/1000 grams
10001 kg = 1000 grams1 gram = 0.001 kg