

Pounds to Kilograms Conversion 
This calculator provides online conversion of pounds to kilograms and back kg to lb conversion.
The international avoirdupois
pound is equal to exactly 453.59237 g. The definition of the international
pound was agreed by the United States and countries of the Commonwealth
of Nations in 1958. In the United Kingdom, the use of the international
pound was implemented in the Weights and Measures Act 1963. “The
yard or the metre shall be the unit of measurement of length and
the pound 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 0·9144 metre exactly; (b) the pound shall be 0.453 592 37 kilo exactly.”
Weights and Measures Act, 1963, Section 1(1). An avoirdupois pound
is equal to 16 avoirdupois ounces and to exactly 7,000 grains. The
conversion factor between the kilo and the international pound 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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