what is weight/ mass unit converter ?

A weight and mass unit converter is a tool or application that allows you to convert measurements of weight or mass from one unit to another. While weight and mass are related concepts, they are not exactly the same. Mass is a measure of the amount of matter in an object, and its standard unit is the kilogram (kg). Weight, on the other hand, is the force exerted on an object due to gravity, and its standard unit is the newton (N).