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Converters

LBS to KG Converter

Enter a weight in pounds to get it in kilograms. The conversion is exact: a pound is defined as precisely 0.45359237 kilograms.

kilograms

0.4536 kg

1 lb converted · 1 lb = 0.4536 kg

Convert kilograms to pounds

Common pounds to kilograms values

Reference table converting common pounds values to kilograms
lbkg
10.4536
52.27
104.54
209.07
5022.68
10045.36
15068.04
18081.65
20090.72

How to use this tool

  1. Type the weight in pounds.
  2. The result in kilograms appears below, along with a table of common values.

Formula and method

kilograms = pounds × 0.45359237

A single multiplication, and an exact one — this factor is the legal definition of the pound.

Worked examples

180 lb in kilograms

  1. 180 × 0.45359237 = 81.6466

81.65 kg.

A 50 lb US baggage limit

  1. 50 × 0.45359237 = 22.68

22.68 kg — slightly under the 23 kg used elsewhere.

Notes and limitations

  • To go from stone and pounds, multiply the stone by 14 and add the pounds before converting.
  • The factor is exact, so converting back and forth loses no precision.
  • Gym plates and barbells are often sold in both, and a '45 lb' plate is 20.41 kg, not 20 kg — the two are not interchangeable when loading a bar.

Frequently asked questions

How many kg is 1 pound?

Exactly 0.45359237 kg, usually rounded to 0.4536. Roughly, halve the pounds and subtract about 10%.

How do I convert stone and pounds to kg?

Multiply the stone by 14, add the extra pounds, then multiply by 0.4536. 12 stone 5 lb is 173 lb, which is 78.5 kg.

How many kg is 150 lbs?

68.04 kg.

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