The Kilogram or kg is defined as equal to the mass of the International Prototype of the Kilogram (IPK), a block of platinum iris alloy manufactured in 1889 and stored at the International Bureau of Weights and Measures in Sèvres, France
It is the only unit that is represented by a physical object rather than by a fundamental physical property that can be reproduced in the laboratory
The pound or lb is a measure of mass used in the imperial system, and is accepted daily as a unit of weight (the gravitational force acting on any given object)
One pound is equal to 0.453597kg
In order to calculate Pounds from Kilograms, you must apply the following formula:
Kilogrammes * 2.2046 = Livres
Example: for 15kg the equivalent in Pounds will be 33.069lb
15 * 2.2046 = 33.069lb
In order to calculate Kilograms from Pounds, you must apply the following formula:
Livres / 2.2046 = Kilogrammes
Example: for 55.115lb the equivalent in Kilograms will be 25kg
55.115 / 2.2046 = 25kg