3 milligrams is the weight of an average ant.
Tonnes
GRAMS
The SI unit for mass is the kilogram (kg)
Mass is measured using kilograms.
Mass is measured in kilograms.
The tonne.
Grams
Kilograms
You would measure that in grams, or milligrams.
mg.
The SI unit of mass is kilogram (kg).
Weighing balance is used to measure mass. The metric unit is kilograms.