There are 63 kilograms in 139 pounds. The conversion between kilograms and pounds is a simple process. Since there are 2.2046 pounds in one kilogram, convert between the two units of mass by dividing the value in pounds by 2.2046. The final answer equals kilograms.
Kilograms are the basic unit of mass in the International System of Units. This system of units is used around the world, except in the United States and a few other countries.
The customary system of units is used in the United States. Pounds are the basic unit for mass in the customary system of units. Converting kilograms to pounds essentially converts the value from one unit of mass to another.