Mass Converters
Convert units of mass. Mass is kept separate from weight (a force); pound-force and kilogram-force are not covered.
Popular mass conversions
- Kilograms to pounds
- Pounds to kilograms
- Grams to ounces
- Ounces to grams
- Kilograms to stone
- Stone to kilograms
- Metric tonnes to kilograms
- Kilograms to grams
Units
- Milligram (mg)
- Gram (g)
- Kilogram (kg)
- Metric tonne (t)
- Ounce (oz)
- Pound (lb)
- Stone (st)
- Microgram (µg)
- Troy ounce (oz t)
- Grain (gr)
Notes and definitions
- Ounces and pounds are avoirdupois units of mass (1 lb = 0.45359237 kg exactly).
- The stone is the British unit of 14 avoirdupois pounds (6.35029318 kg). The troy ounce (31.1034768 g, used for precious metals) is a different unit from the avoirdupois ounce, and the grain is exactly 1/7000 of a pound (64.79891 mg).
- Mass cannot be negative.
Sources: NIST Special Publication 811 (Guide for the Use of the SI); BIPM SI Brochure.