Weight is a vector quantity, a force that acts on a support or suspension. In the international system of units SI, weight is measured in newtons.
Mass is a scalar that is a measure of inertia. In SI units, mass is measured in kilograms.
Scales - are the support on which the force acts when weighing the body, therefore the scales are a device for determining body weight by the force acting on them.
In order to determine what body weight would be on another planet when weighed on ordinary scales, it is necessary to divide the gravitational acceleration on a given planet by the gravitational acceleration on the planet Earth, and then multiply the resulting quotient by the body weight, which the scales on Earth show in kilograms.