1 Kilogram : The kilogram (abbreviation, kg) is the Standard International (SI) System of Units unit of mass. 1 Kilogram is defined as the mass of one liter (10-3 cubic meter) of pure water.
1 Quintal = 100 kg and 100 kg = 1 quintal.
hence 1 kg = 1/100 = 0.01 quintal
1 kg = 0.001 metric ton
1 kg = 1000 gram