Mass (Weight) Unit Converter

Enter a number in the From field, select units, and then click Convert.

How to use:
Enter the initial value you'd like to convert in the From filed, select the initial and target measurement units, and then click Convert. For your convenience this tool will also convert the entered value into other often used units.

Notes:

The following symbols and abbreviations can be used for:

• milligram - mg
• gram - g
• kilogram - kg
• metric ton or tonne - t
• ounce - oz
• pound - lb
• stone - st
• short ton - tn

There is ambiguity in the use of the term "weight" to mean either force or mass. In general usage, the term "weight" nearly always means mass and this is the meaning given the term in U.S. laws and regulations. Where the term is so used, weight is expressed in kilograms in SI. In many fields of science and technology the term "weight" is defined as the force of gravity acting on an object, i.e., as the product of the mass of the object and the local acceleration of gravity. Where weight is so defined, it is expressed in newtons in SI.