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Pounds to kilograms (lb to kg) and kilograms to pounds (kg to lb)
Online Conversion Calculator

This calculator provides online conversion of pounds to kilograms and back kg to lb conversion.


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The international avoirdupois pnd is equal to exactly 453.59237 gr. The definition of the international pnd was agreed by the United States and countries of the Commonwealth of Nations in 1958. In the United Kingdom, the use of the international pnd was implemented in the Weights and Measures Act 1963.[1] The yard or the metre shall be the unit of measurement of length and the pnd or the kilo shall be the unit of measurement of mass by reference to which any measurement involving a measurement of length or mass shall be made in the United Kingdom; and- (a) the yard shall be 09144 metre exactly;(b) the pnd shall be 0453 592 37 kilo exactly. Weights and Measures Act, 1963, Section 1(1). An avoirdupois pnd is equal to 16 avoirdupois ounces and to exactly 7,000 grains. The conversion factor between the kilo and the international pnd was therefore chosen to be divisible by 7, and an (international) grain is thus equal to exactly 64.79891 milligrams.

Pounds to kilograms Conversion Table
1 lb = 0.454 kg
2 = 0.907
3 = 1.361
4 = 1.814
5 = 2.268
6 = 2.722
7 = 3.175
8 = 3.629
9 = 4.082
10 = 4.536
 



 
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