Unit Converters

Mass Converter

Convert mass between metric units and international avoirdupois pounds and ounces. This does not calculate force or gravitational weight. Enter a nonnegative value and select both units.

Inputs stay in this browser tab. Results are not saved.

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How to use Mass Converter

  1. Enter “Value”, using the units and limits shown in its label.
  2. Choose the appropriate “From unit” option for your task.
  3. Choose the appropriate “To unit” option for your task.
  4. Select Calculate or Process. Review the result and any validation message before copying or downloading available output. Reset clears the result and restores the starting inputs.

Method & assumptions

Converted value = input × source base-unit factor / destination base-unit factor.

Worked example

1 kilogram is approximately 2.20462 pounds.

Results and projections are informational estimates, not financial, medical, legal, tax, or property advice. Check assumptions, units, rounding, and local requirements independently. Investment illustrations do not guarantee returns. Keep original files and check transformed output before use.

Questions, answered

Which ton is used?

The tonne is the metric tonne of exactly 1000 kilograms, not a US short ton or imperial long ton.

Where does this calculation run?

It runs locally in your browser. Enter plain numbers without currency symbols or thousands separators; use the same currency and measurement units throughout unless a converter explicitly asks for units.