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Weight converter (mass)

Pounds to kilograms, ounces to grams, and more — exact and instant.

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About Weight converter conversion

Weight conversions turn up in kitchens, gyms, doctors' offices, and shipping desks. A recipe lists flour in grams, your scale reads ounces; a training plan quotes kilograms, your plates are in pounds; a courier charges by the kilo, your box is labelled in pounds. This tool handles milligrams, grams, kilograms, ounces, pounds, and US short tons.

The factors are the legal definitions: one pound is exactly 0.45359237 kg and one avoirdupois ounce is exactly 28.349523125 g, so sixteen ounces make one pound to the last digit. A US ton here means the short ton of 2,000 lb (907.18474 kg), not the metric tonne of 1,000 kg or the British long ton — a frequent source of mix-ups when comparing freight or vehicle specs.

Milligrams are handy for supplement and medication labels, though converted figures are for information only and are no substitute for a pharmacist's guidance. Troy ounces used for precious metals are a different unit and are not included.

How to do it

  1. Open the Unit tool with the button above; it starts on Weight with Pounds → Kilograms.
  2. Enter the amount in the Value field — decimals are fine.
  3. Choose the units you need, for instance Ounces to Grams for baking.
  4. Read the converted weight straight away in the result panel.
  5. Press Swap to flip the conversion direction.

Weight converter FAQ

How many kilograms is one pound?

Exactly 0.45359237 kg, so one kilogram is about 2.2046 pounds.

Is the ton a metric tonne?

No. It is the US short ton of 2,000 pounds. A metric tonne is 1,000 kg, which you can get by converting to kilograms.

Does it support troy ounces or stones?

No. It covers milligrams, grams, kilograms, ounces (avoirdupois), pounds and US tons.

Is weight the same as mass here?

Yes — like everyday scales, the tool treats these as mass units.

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