The SI unit for weight is the newton. Please note that in popular usage, kilogram is considered a unit of "weight" - which is wrong, according to physicists, but perhaps you were thinking about the mass.
kilograms.
milli-gram
The metric unit for measuring human weight is actually the Newton (N). Newton's are a measure of force and weight is the product of the acceleration of gravity and an objects mass. The metric unit for measuring human mass is the kilogram (kg).
A gram would be an appropriate measure for its mass.
It depends on whether you want to measure mass or weight so your question needs to be more specific.
you would measure it in kilograms
kilograms.
gram
A scale
Mass is measured in kilograms.
milli-gram
The weight of the box would be measured in grams.
Every country in Europe uses the metric system, meaning they would measure weight in kilograms, grams, etc.
The metric unit for measuring human weight is actually the Newton (N). Newton's are a measure of force and weight is the product of the acceleration of gravity and an objects mass. The metric unit for measuring human mass is the kilogram (kg).
A gram would be an appropriate measure for its mass.
It depends on whether you want to measure mass or weight so your question needs to be more specific.
Grams