Online Calculators
Math Games

Mass Converter

Convert between the most common mass units

How to use this mass unit converter

Type in what you want to convert from. For example, if you want to see what 9 lbs equals in the other units, type 9 in the pounds field. You can also type mathematical expressions directly in the input fields, e.g. 7+2 pounds.

The table below shows the different mass units

UnitMass in kilograms
1 gram (g)0.001 kg
1 milligram (mg)0.000001 kg
1 stone (st)6.35029318 kg
1 pound (lb)0.45359237 kg
1 ounce (oz)0.028349523 kg
1 troy ounce (t oz)0.0311034768 kg
1 grain (gr)0.00006479891 kg