What is the metric unit for weight?

Answer 1

Newtons (symbol: N).

Do not confuse weight with mass (the unit of mass is the kilogram). Weight is the downward force exerted by a mass because of the pull of gravity.
The unit of weight is Kg*m/s2
Metric unit for mass is kilograms (kg), however weight is a different measurement defined as force that will act on the object due gravity of a given planet (so it measures in Newtons, N). On Earth your weight is almost the same as your mass (and that is not a coincidence) but on the other planet your mass will remain the same (say 70kg) while your weigh may change dramatically (depending on the gravity of the planet). In the free fall state your weight is zero.

Answer 2

Newtons (symbol: N). Do not confuse weight with mass (the unit of mass is the kilogram).