Scotstone's "2.2" conversion factor works quite well
(give or take a
marmite sandwich)
kempie,
I was a split/second from providing a similar link and noticed you had beat me to it, so I went back and did some more searching. . .
By international treaty the avoirdupois pound equals 0.45359237 kilograms, therefore 142 pounds equal exactly 64.41011654 kilograms.
Look under �Primary Conversion Factors� near the bottom of this page:
Final Answers . . .
. . . un uh . . . not so fast . . . more details here