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Pounds to kilograms (lb to kg) Online Converter


Kilograms to pounds (kg to lb) Online Converter

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The avoirdupois pound (abbreviation: lb)
is a unit of mass used in the US customary and imperial systems of measurement, and is descended from the Roman libra (hence the common abbreviation - lb). The international pound (lb) is defined as 0.45359237 kilograms (exactly). The international pound is divided into 16 ounces.

The kilogram (symbol: kg), is the base unit of mass in the Metric system (the International System of Units or SI). The kilogram is also known as kilogramme (in UK) and is defined as being equal to the mass of the International Prototype of the Kilogram. The kilogram is equal to 1000 grams and was originally defined in 1795 as the mass of one cubic decimeter (or 1 liter) of water at 4°C. The kilogram is approximately equal to 2.20462262 international (avoirdupois) pounds. The prototype kilogram was manufactured in year 1799 and has a mass equal to the mass of 1.000025 liters of water at 4°C.


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