US Avoirdupois Weight Units Converter

From:	To:
long ton short ton long hundredweight [lg cwt] short hundredweight [sh cwt] pound [lb av.] ounce [oz av.] dram [dram av.] grain [gr av.]	long ton short ton long hundredweight [lg cwt] short hundredweight [sh cwt] pound [lb av.] ounce [oz av.] dram [dram av.] grain [gr av.]
1 \(\left[\mathrm{lb av.}\right] = 0.45359237 [kg]\)

The US pound avoirdupois was defined by Act of Congress in 1866 as \(\frac{1}{2.2046} [\mathrm{kg}]\), but was mor accurately related to its metric equivalent in 1895 as 0.45359224277 [kg]. Today, for engineering purposes, the US and British pounds can be regarded as identical, defined as equal to 0.45359237 [kg] by the WMA, 1963 in Britain, and in North America by the US metric Board in 1959.