Off the top of my head, it's 2.2 pounds in a kg. It's the f to c conversion that is loopy, divide by 9/5 and add 32, something like that, or the opposite. Ben

Off the top of my head, it's 2.2 pounds in a kg. It's the f to c conversion that is loopy, divide by 9/5 and add 32, something like that, or the opposite. Benefit of the metric system is easy conversion between units. Multiplication factor between cm,m,km is 100,1000. What's the multiplication factor between inches,yards,miles? I have no idea.