Miles to KM converter

How to convert miles to kilometers

To convert miles to kilometers, use km = mi × 1.60934. For example, 20 mi is 32.1869 km. Type any value in the converter above and the result updates instantly.

The Miles to KM formula

The conversion is km = mi × 1.60934. One mile equals 1.60934 km. This conversion is exact: mile is defined precisely in terms of kilometer, so the only rounding is in the digits shown.

Miles to KM conversion table

Where miles and kilometers are used

Miles measure road distances in the United States and the United Kingdom, and appear in running, cycling and aviation.

Kilometers measure road and running distances in almost every country outside the United States and the United Kingdom.

Worked examples

These examples use the formula above, so you can check the converter or do the same by hand:

• 2 mi = 3.21869 km
• 5 mi = 8.04672 km
• 15 mi = 24.1402 km

Converting miles to kilometers in your head

Multiply by 1.6, or add half and a tenth: 10 miles is 16 km (exactly 16.09 km).

KM to Miles reference table

For the opposite direction, these values are handy to have at hand:

Common mistakes to avoid

• Do not confuse the international inch (exactly 25.4 mm) with the US survey foot used in old land records; everyday conversions use the international values.
• Feet and inches are often written together: 5 ft 9 in is 69 inches, or 175.26 cm.

About this converter

The converter accepts whole numbers, decimals and negative values, gives the result as you type, and uses full precision internally, so what you copy is as accurate as it can be. It runs in your browser: nothing you type is sent to a server, it keeps working offline once the page has loaded, and there is nothing to install.

Need the opposite direction? Use the KM to Miles converter.