Hi, I'm not sure i'm posting in the right section, but it might have something to do with politics. Some friend of mine, from UK, told me that at school, she learned metric system, but still uses " feet ", " ounces ", " lbs " as measurement units. I'm wondering : from the decision a country takes to move to another scale, what makes that it " works " or not to have people move to the new measurement system ? I guess it's part of the " uses ", if you learn at school " metric " but at home your dad & mom use and talk to you in " imperial ", i think imperial will rule. An american sister who works in the US Navy told me that she uses AM/PM at home, but in the army, she uses 24hours scale. A few mins ago (the origin of this post), i read that american scientists use Celsius degrees, but common people use Fahrenheit degrees at home in USA. I don't know exactly where people are in these scales, except from my UK friend : in your country (no matter where it is), do you learn metric at school and use imperial at home ? I've checked a few UK recipes, and see most are in imperial (those yummy scones ). From your point of view, if you're in such a case, how long will it take to have the " official system " adopted ?