How much is 82.2kg in stones and pounds. 82.2 kilograms is equivalent to 12 stones or 13.220 pounds. A bit of a trivia, the metric system was devised in France in the 18th century.It is based on seven base units for seven base quantities, such as length (meter), mass (kilogram), time (second), electric current (ampere), thermodynamic temperature (kelvin), amount of substance (mole) and luminous intensity (candela).British use a mixture of imperial and metric measurements.t is based on seven base units for seven base quantities, such as length (meter), mass (kilogram), time (second), electric current (ampere), thermodynamic temperature (kelvin), amount of substance (mole) and luminous intensity (candela). British use a mixture of imperial and metric measurements.