1 Pound = 0.45359237 Kilogram
There are 0.45359237 kilograms in a pound, because one kilogram is defined as the mass of one liter of water and the same amount of water equals to 2.20462262 pounds.
Pound is an imperial and US customary systems mass unit and equals to 0.45359237 kilogram. The abbreviation is "lb".
Kilogram is the base unit of mass in metric system. 1 kilogram equals to 2.204 pounds or 35.274 ounces. The abbreviation is "kg".