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Weight Converter

Convert weight and mass between 8 units.

3 inputs

Value, From, To

Reviewed October 7, 2026

Exact definitions of the units in terms of SI units.

Type a value and the result updates as you go.

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Type a value to convert.

How this calculator works

The avoirdupois pound is defined as exactly 0.45359237 kg, which makes every conversion here exact. An ounce is one sixteenth of a pound, a stone is 14 pounds and a US short ton is 2,000 pounds. Strictly these are units of mass; in everyday use weight and mass are treated as the same thing.

Formula

  • 1 lb = 0.45359237 kg (exact)
  • 1 oz = 1/16 lb = 28.349523125 g
  • 1 st = 14 lb
  • 1 US short ton = 2,000 lb; 1 metric ton = 1,000 kg

Worked example

1 kg to lb

Value
1
From
Kilogram (kg)
To
Pound (lb)

Result2.2046226 lb

1 kg = 2.2046226 lb. 1 kg = 2.2046226 lb.

Frequently asked questions

How many pounds are in a kilogram?

1 kg is about 2.20462 lb. Going the other way, 1 lb is exactly 0.45359237 kg.

What is the difference between a ton and a tonne?

A tonne (metric ton) is 1,000 kg. A US short ton is 2,000 lb, about 907 kg. A UK long ton is 2,240 lb, about 1,016 kg.

Is this the same ounce used for gold?

No. Precious metals use the troy ounce, 31.1034768 g. This converter uses the everyday avoirdupois ounce, 28.3495 g.

Results are estimates based on the values you enter and the published method shown above. They do not replace professional medical, financial or legal advice. Method reviewed October 7, 2026. About this site