Kilometer or km and Mile are two units of length. Generally we use kilometer now but in some cases mile is useful. There are 0.621371192 miles per kilometer and there are 1.609344 kilometers per mile. Subsequently, you can find the solution to 20 km to miles two unique ways. You can either increase 20 by 0.621371192 or partition 20 by 1.609344. The answer if you convert 20 km to miles will be 12.427 miles.