How many pounds are in a kilogram?

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How many pounds are in a kilogram?

Are you trying to convert pounds to kilograms for cooking or know your own weight? How many pounds are in a kilogram?

Kilogram, designation kg, is the unit of mass in SI. It is defined by adopting the set numerical value of Planck’s constant h, which is 6.62607015⋅10−34, expressed in the unit J · s, which is equal to kg⋅m2⋅s − 1, where meter and second are defined by ci ∆ νCs. The pound, on the other hand, is an off-system unit of mass derived from the Roman libra. The pound measure has varied over the centuries across countries, usually between 0.4 and 0.5 kilograms. Currently, in the Anglo-Saxon countries, an international pound of 0.453 592 37 kg is adopted and the abbreviation lb is used. 

To convert pounds to kilograms you can use the practical rule:

  • To get kilograms, divide by 2 and then take 1/10 of your answer
  • Eg 100 pounds … Divide by two = 50 kg. Take off 1/10 = (50 – 5) = 45 kg.

This is close to the real answer of 45,355923 kg and is much easier to do in your head! 

How many pounds are in a kilogram?
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However, if you need an accurate conversion of pounds to kilograms. Use these conversion rates.

1 pound (pound) is equal to 0.45359237 kilogram (kg)

1 pound = 0.45359237 kg

The mass m in kilograms (kg) is equal to the mass m in pounds (pounds) times 0.45359237:

m (kg) = m (pound) × 0.45359237 

Example

Convert 5 pounds to kilograms:

m (kg) = 5 pounds × 0.45359237 = 2.268 kg

 

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