One pound is equal to approximately 0.45359 kilograms. One kilogram is approximately equal to 2.2046 pounds. Kilograms are a unit of measurement in the International System of Units or the metric system. Pounds are a unit of measurement in the customary system of units or the imperial unit system.
Both pounds and kilograms are units of mass. Kilograms are used widely around the globe because the metric system is used in the majority of the countries throughout the world. Pounds are used mostly in the United States and a few other countries where nations utilize the customary system of units.