weight conversion from pounds to kilograms
1 Since 1 July 1959, the international avoirdupois pound has been defined as exactly 0.45359237 kilogram. 2  Kilograms are denoted by the sign kg. 3  Pounds are denoted by the sign lb. 4  This implies that there are 1/0.45359237 â 2,20462262 pounds in a kg.