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Weight Converter

Convert between metric and US weights, from milligrams to tons. Enter one value and every unit updates.

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01How to use the Weight Converter

  1. 01Type the weight you want to convert.
  2. 02Choose the unit you are converting from.
  3. 03Read every other unit in the table and copy the one you need.

02Conversion factors

All conversions go through kilograms:
1 oz  = 0.028349523125 kg   1 mg = 0.000001 kg
1 lb  = 0.45359237 kg       1 g  = 0.001 kg
1 st  = 14 lb = 6.35029318 kg
1 US ton = 2,000 lb = 907.18474 kg
1 metric tonne = 1,000 kg

03Examples

1 pound = 453.59237 grams.

70 kilograms = 154.3236 pounds.

12 ounces = 340.1943 grams.

04Frequently asked questions

Which ton does this use?

Both the US short ton (2,000 lb) and the metric tonne (1,000 kg) are listed. The British long ton (2,240 lb) is not included.

Are these troy ounces?

No. These are avoirdupois ounces, used for food and everyday goods. Precious metals use troy ounces of about 31.1 grams.

Is weight the same as mass?

In everyday use, yes. Strictly, kilograms and pounds measure mass; weight is the force of gravity on that mass.