Convert kilometers to miles (and back)
Length converter for km, miles, meters and feet. International statute mile by default; nautical mile is in the list.
Pick Length, type a number, and set the from/to units. The factor for a statute mile is 1.609344 km. Swap the pair if you started in miles.
Nautical miles sit in the same list (1 NM = 1852 m). Do not mix them with road miles on a flight plan. Feet and yards are there for maps and construction notes.
Results stay on the device. Overflow on absurd magnitudes shows an error instead of a giant string. For temperature use the separate °C ↔ °F page.
One international mile is 1.609344 kilometres, so 10 km is 6.2137 mi and 26.2 mi is 42.1648 km. A marathon is 42.195 km, not exactly 26 miles. The page opens with kilometres on the left and miles on the right. Nautical miles and the old Russian verst are different units and are not this pair. Rounding to two decimals is enough for a road distance and too coarse for a survey. The general unit tool still lists metres and feet if you need them after the trip conversion.
FAQ
Statute or nautical mile?
Default is the international statute mile. Nautical mile is a separate unit in the length list.
Is the factor exact?
Yes: 1 mile = 1.609344 km by international agreement. Rounding follows the converter display.
Does it upload the number?
No. Conversion is arithmetic in the browser.