Kilometer is a unit of the metric system mainly used to express a distance. The abbreviation of kilometer is km. It is a unit of the International System of Units (SI units). Examples: Some examples of distances in kilometers are, the distance from one city to another city, the distance of a runway, the distance you would cover while taking a walk can also be measured using km.

A mile is a unit followed in the United States for measuring distance. The metric unit followed in the United States is called the "United States Customary Units (USCS)". Even though kilometers and miles are used for measuring the same unit (distance), the value differs. It is abbreviated as "mi". The relation between kilometer and miles is given as, 1 km = 0.62137 mi.

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