Why do Americans insist on using imperial measurement instead of metric measurement?
I really don't like it!
And I found this answer:

"isn’t it about time that the USA moved on from imperial measurements to metric? We did, for scientific measures, which is the only place it makes sense. Why would you say someone is 183 cm, when you can say he’s six feet? Everyday measures are much better for everyday things. Why wouldn’t you say it’s 3 miles away when everyone knows what that means? A 200-pound man is a big man. 90 kgs? Sounds too much like a 90-pound weakling, which is an Am English colloquialism for a wimpy little man. Simply no reason to adopt metric outside the laboratory."