Weight/Mass Converter
Convert between weight and mass units
mg
g
kg
t
oz
lb
st
Quick Reference
1 kilogram =
1000 grams
1 tonne =
1000 kg
1 pound =
16 ounces
1 stone =
14 pounds
Weight vs Mass
What's the Difference?
Mass is the amount of matter in an object (measured in kg, g). Weight is the force of gravity on that mass (measured in Newtons). In everyday use, we often use "weight" to mean "mass."
Metric System
- Milligram (mg) - 1/1,000,000 kg
- Gram (g) - 1/1,000 kg
- Kilogram (kg) - Base unit
- Tonne (t) - 1,000 kg
Imperial System
- Ounce (oz) - Base unit
- Pound (lb) - 16 ounces
- Stone (st) - 14 pounds (mainly UK)