In the metric or SI system it's grams (with added prefixes as appropriate). The SI unit for mass is a kilogram. A gram is a submultiple of the kilogram.
Mass is measured in kilograms (kg) in the SI system of measurement.
The tripple beam balance.
Kilograms, Hectograms, Decagrams, Grams, decigrams, centigrams, milligrams.
physical balance