Mass Converter
This free online mass conversion tool makes it easy to convert a mass measurement into a wide range of commonly used metric and imperial units. Whether you’re working with scientific measurements, cooking ingredients, shipping weights, or industrial loads, this calculator delivers fast and accurate conversions.
With this mass calculator, you can convert between Micrograms, Milligrams, Grams, Kilograms, Metric Tons, Ounces, Pounds, Stones, Short Tons, and Long Tons. Simply enter a value into any of the input fields, and the calculator will instantly calculate and display the equivalent values across all other mass units. This allows you to compare measurements used across different countries and industries without manual calculations.
Enter Mass / Weight
How to Use?
The mass conversion calculator is a handy webtool to use to convert from one mass to another.
- Enter a mass value into one of the fields above.
- All the other fields will automatically update to their converted mass.
- You can copy any mass value to the clipboard, by clicking on the symbol.
- Any number value will be accepted including the 'e' exponent.
- If you would like to see another mass added to the above, please contact us.
Mass Unit Comparison Table
| Unit Name | Symbol | Description | Equals in Kilograms |
|---|---|---|---|
| Microgram | µg | Very small metric unit used in science and medicine | 0.000000001 kg |
| Milligram | mg | Used for small quantities and precision measurements | 0.000001 kg |
| Gram | g | Standard metric unit for everyday weights | 0.001 kg |
| Kilogram | kg | Base unit of mass in the metric system | 1 kg |
| Metric Ton | t | Used for large metric weights | 1,000 kg |
| Ounce | oz | Small imperial unit commonly used in cooking | 0.0283495 kg |
| Pound | lb | Common imperial unit for body and package weight | 0.453592 kg |
| Stone | st | Imperial unit mainly used in the UK | 6.35029 kg |
| Short Ton | ton (US) | Used in the United States | 907.185 kg |
| Long Ton | ton (UK) | Imperial ton used in the UK | 1,016.05 kg |
Helpful Notes
- Metric units scale by factors of 10, making conversions straightforward.
- Imperial units vary by region and use case.
- Short tons and long tons are not the same as a metric ton.
- Micrograms and milligrams are commonly used in laboratory and medical contexts.

