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Understanding Weight/Mass Conversion

Mass measures the amount of matter in an object, while weight is the force exerted by gravity. In everyday use, these terms are often interchangeable. The kilogram is the SI base unit.

Unit Type Unit Name Value in Kilograms (kg)
Metric Small Milligram (mg) 0.000001 kg
Metric Small Gram (g) 0.001 kg
Metric Standard Kilogram (kg) 1 kg
Metric Large Metric Ton (t) 1,000 kg
Imperial Ounce (oz) 0.0283495 kg
Imperial Pound (lb) 0.453592 kg
Imperial Stone (st) 6.35029 kg
Imperial US Ton 907.185 kg
Imperial UK Ton 1,016.05 kg
Precious Carat (ct) 0.0002 kg

Conversion Tip

Mass and weight are often used interchangeably in everyday contexts. The kilogram is the SI base unit for mass.


Quick Reference

  • 1 kilogram = 2.205 pounds
  • 1 pound = 453.592 grams
  • 1 ounce = 28.35 grams
  • 1 ton (metric) = 1,000 kilograms
  • 1 ton (US) = 907.185 kilograms
  • 1 stone = 6.35 kilograms
  • 1 gram = 1,000 milligrams
  • 1 carat = 200 milligrams
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