INTERACTIVE TOOL
Weight and mass converter
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How to use this tool
- Enter a mass.
- Identify its source unit.
- Choose the output unit and verify its symbol.
Formula or method usedEach unit is normalized to kilograms before conversion.
Worked example
One kilogram equals one thousand grams. A pound is not a decimal multiple of a kilogram.
Assumptions and limits
The tool converts mass, not force under a particular gravity.
Frequently asked questions
Which stone does it use?+
It uses the standard British stone of 14 pounds.
What happens to my inputs?+
Calculation inputs are processed locally in your browser. Favorites and preferences may be saved on this device. The site may perform separate network requests for live panels; these do not include the values entered into this local calculator. Do not paste secrets into public tools.
How should I check the result?+
The tool converts mass, not force under a particular gravity.