It is the SI unit (that is, the international standard unit) of mass
Kg (kilogram) is the standard - although it is not a standard of weight, but of mass. The kilogram is used world-wide as the standard of mass. It is part of the SI (the International System of units).
The standard International System of Units (SI) unit of mass is the kilogram (kg).
The SI unit for mass is the kilogram (kg).
one cubic decimeter, or the volume of one kilogram of water
the International Standard (denoted "SI" from the French Standard Internationale) unit of measure for Mass is the kilogram (kg)
It depends on the size of the sack. A sack is not an international standard measure.
The metric standard unit of mass is the kilogram (Kg).
The kilogram is defined as being equal to the mass of the International Prototype Kilogram (IPK). The IPK is made of a platinum-iridium alloy and is stored in a vault at the BIPM in Sèvres, France.
The kilogram is the SI base unit of mass and is equal to the mass of the international prototype of the kilogram.In metric System there are many units to measure the mass of the objects like pounds, gm, lbs, kg,etc.
It is the SI system - the International Standard system) .
To keep the amaterial that the offical kg weight from being decomposed by oxidation and thus keeping the weight constant.