It is a customary unit.
mile and kilometer
mi is not a unit in the metric system. It is used as the standard symbol for mile in non-metric systems, so as not to confuse it with m for metre.
Kilometer or mile
The Kilometer. One Mile equals 1.61 kilometers.
A kilogram is a unit of mass (weight) but a mile is a unit of distance. Distance does not have mass so you cannot say that any amount of kilograms are equal to a mile. A kilometer is the metric unit of distance. There are 1.61 kilometers in a mile.
The metric unit is a millilitre. The metric unit is a millilitre. The metric unit is a millilitre. The metric unit is a millilitre.
Kilometer is a measure of length or distance in the metric system. It is usually compared to the 'mile' unit. One kilometer is equal to about 0.621 mile.
I not a metric unit of anything! A litre is one metric unit for volume.