Miles (mi) to Kilometers (km) Converter

How many miles (mi) are in 1 kilometer (km)? What is the formula for how to convert miles to kilometers (mi to km)?

1 mile (mi) = 1.609344 kilometers (km)
So we can say that there is 1.609344 kilometers in 1 mile.
This means that the multiplication conversion factor to convert a quantity expressed in a mile unit of measurement to an equivalent quantity expressed in a kilometer unit of measurement is 1.609344.

Inversely (or reciprocally),

1 kilometer (km) = 0.62137119223733 mile (mi)
So we can say that there is 0.62137119223733 mile in 1 kilometer.
This means that the division conversion factor to convert a quantity expressed in a mile unit of measurement to an equivalent quantity expressed in a kilometer unit of measurement is 0.62137119223733.

Knowing this inverse mathematical relationship between the two conversion factors and their reciprocal operations, we can derive two formulas to calculate and convert a quantity of length expressed in miles to an equivalent quantity of length expressed in kilometers (mi to km). Both formulas will yield the same result. The formulas are:

km = mi × 1.609344    → This is the formula based on the multiplication conversion factor.

and

km = mi ÷ 0.62137119223733    → This is the formula based on the division conversion factor.

For example, if you have a length of 500 miles that you want to convert to kilometers, you would use either of the two formulas as follows:

km = 500 mi × 1.609344 = 804.672 km

km = 500 mi ÷ 0.62137119223733 = 804.672 km

So, the result is the same using either formula, which is 804.672 kilometers.

Miles to kilometers (mi to km) conversion chart

To save you time and effort spent on having to perform manual calculations or look up conversion formulas every time a conversion from miles to kilometers is needed, here is a miles-to-kilometers conversion chart for your quick and easy reference. This conversion chart (or conversion table) shows common measurement values of length in miles and their equivalent measurement values in kilometers. These equivalent measurement values may be rounded off to 1 or 2 decimal places when it is mathematically expedient for everyday applications.

Conversion factor of 1 mile to other units of length

Here is a reference list providing a conversion of 1 mile (mi) to its equivalent values in various units of length, both metric and imperial:

What is a mile (mi)?

Definition of mile: A mile (formally known as statute mile) is an imperial and US customary unit of length equivalent to 1,760 yards or 1.609 kilometers. It is commonly used in the United States and the United Kingdom for measuring longer distances, especially on roads and highways. The abbreviation for mile is mi.

What is a kilometer (km)?

Definition of kilometer: A kilometer is a unit of length in the International System of Units (SI), commonly known as the metric system, equal to one thousand meters (10^3 m). It is commonly used for longer distances, such as races, road distances and geographical features. The abbreviation for kilometer is km. The single Unicode character ㎞ (U+339E) represents the 2-character Latin abbreviation for kilometer. The Windows Alt code for this character ㎞ is Alt + 13214.