Editing Weight (section)

===SI units===
In most modern scientific work, physical quantities are measured in [[International System of Units|SI]] units. The SI unit of weight is the same as that of force: the [[newton (unit)|newton]] (N) – a derived unit which can also be expressed in [[SI base unit]]s as kg⋅m/s<sup>2</sup> (kilograms times metres per second squared).<ref name=NIST811wt/>

In commercial and everyday use, the term "weight" is usually used to mean mass, and the verb "to weigh" means "to determine the mass of" or "to have a mass of". Used in this sense, the proper SI unit is the [[kilogram]] (kg).<ref name=NIST811wt/>