Pounds to kilograms
Unit conversionHow many kilograms is a pound?
Multiply pounds by 0.45359237 to get kilograms, or enter any weight to convert it.
What you enter stays on your device while you use this tool. Opening a shared link sends the settings in its address to HowToolbox to prepare the page.
Result
0.4536 kg
1 pound is about 0.4536 kilograms
- The other way round: 1 kg ≈ 2.205 lb.
In all units
- Milligrams
- 453,600 mg
- Grams
- 453.6 g
- Kilograms
- 0.4536 kg
- Tonnes
- 0.0004536 t
- Carats
- 2,268 ct
- Grains
- 7,000 gr
- Ounces
- 16 oz
- Pounds
- 1 lb
- Stone
- 0.07143 st
- Short tons (US)
- 0.0005 ton (US)
- Long tons (UK)
- 0.0004464 ton (UK)
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Multiply pounds by 0.45359237 to get kilograms, or enter any weight to convert it.
How to use
- Type the weight you want to convert.
- Choose the units to convert from and to. Use the swap button to flip them.
Body weights in pounds
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How it works
Every unit is converted through kilograms using exact definitions: a gram is 0.001 kg, a tonne is 1,000 kg, a pound is exactly 0.45359237 kg, an ounce is 1/16 of a pound, a stone is 14 pounds, a US short ton 2,000 pounds and a UK long ton 2,240 pounds. A metric carat is 0.2 g and a grain is 1/7000 of a pound (64.79891 mg). So 1 kg is 1 ÷ 0.45359237 ≈ 2.20462 lb, and 100 kg is about 220.46 lb.
The pound and ounce are the avoirdupois units of the international yard and pound agreement of 1959, as given in NIST Special Publication 811 and the UK Weights and Measures Act 1985. The tonne is defined in the BIPM SI Brochure.
Strictly, these units measure mass. Everyday “weight” in kilograms or pounds means mass too, so the conversion is the same anywhere on Earth.
Frequently asked questions
How do I convert pounds to kilograms in my head?
Halve the pounds and take away a tenth of the result: 150 lb → 75 → 75 − 7.5 = 67.5 kg (exactly 68.04 kg). For an exact answer, multiply by 0.45359237.
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