Mass/Weight Converter

Convert between mass and weight units including kilograms, pounds, grams, ounces, tons, stones, and other weight measurements accurately.

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About the Mass/Weight Converter

This Mass/Weight Converter turns one weight measurement into another instantly. Enter a value in kilograms, pounds, grams, ounces, tons, or stones, and you get the equivalent amount in your chosen unit. The output shows a precise converted figure you can copy into a recipe or lab note.

The calculator works with fixed conversion factors, such as 1 kilogram = 2.20462 pounds, 1 pound = 16 ounces, and 1 stone = 14 pounds. You provide the number and both units, and the tool multiplies the value by the factor that links them. Note that mass measures the amount of matter, while weight also depends on gravity, so use true mass units for scientific work. For cooking, round the result to the precision your scale supports.

  • Type the number you want to convert in the value field.
  • Select the unit you are converting from in the first dropdown.
  • Choose the target unit in the second dropdown and read the result.