1 km = 0.621371 mi
Distance unit conversion guide
Use this page to convert road distances, running routes, and navigation measurements between kilometers, miles, and nautical miles. Unitivo runs entirely in your browser and keeps a clear record of which units you selected, which helps avoid mistakes when planning trips or interpreting foreign maps.
Kilometers are the standard unit on road signs in most of the world. Miles are used in the United States and still appear in the United Kingdom for road distance. Nautical miles are used in aviation and marine charts because one nautical mile equals one minute of latitude along a meridian.
Unlike length units used for object size, distance units here focus on travel and navigation. A marathon is often discussed in kilometers or miles; a flight plan may use nautical miles. Our converter uses internationally accepted conversion factors so you can move between these contexts quickly.
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Popular distance conversions
- Kilometers to miles — multiply km by 0.621371
- Miles to kilometers — multiply miles by 1.60934
- Nautical miles to kilometers — multiply by 1.852
- 10 km ≈ 6.21 miles
- 5 miles ≈ 8.05 kilometers
Worked example
A 42.195 km marathon is about 26.22 miles. One nautical mile equals 1.852 kilometers or about 1.15078 statute miles.