How many mm in an inch?

Answer by  MelvinVanhorn (826)

One inch is equal to 25. 4 millimeters. The United States is the only country in the world that does not use the metric system, the other last hold out, being England, but even they switched over. The metric system is based on multiples of 10, unlike our system, which isn't really based on any logic.

Answer by  hafeez (64)

As one inch is equal to 2. 5399999187 centimeters and also one centimeter is equal to 10 millimeters. So by multiplying 2. 5399999187 by 10 and rounding up the answer one inch is equal to 25. 4 millimeters.