Calculators & Utilities

Weight and Mass Converter

Convert mass among milligrams, grams, kilograms, ounces, pounds and tonnes.

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About the Weight and Mass Converter

The Weight and Mass Converter uses kilograms as the normalization unit and standard international avoirdupois factors. In everyday language "weight" is accepted, while the numerical units here measure mass.

How to use the Weight and Mass Converter

  1. Enter the source mass.
  2. Select its unit and the desired unit.
  3. Convert and round according to measurement accuracy.

Practical tips

  • A metric tonne is 1,000 kilograms.
  • Ounces here are mass ounces, not fluid ounces.
Helpful answers

Weight and Mass Converter FAQs