KM to Miles Converter

Common km to mi conversions

How this conversion works

1 kilometer = 0.62137119 miles. Multiply kilometers by 0.62137119.

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What you are converting

Kilometer

A kilometer is a metric unit of length equal to 1,000 meters, the standard road-distance measure in most countries; a typical city bus route spans about 5 km.

Mile

A mile is an imperial unit of length equal to 1,609.344 meters, used for road distances in the United States and United Kingdom; a casual 30-minute jog covers roughly 3 miles.

Why convert and when you would use this

Travelers driving in Europe or Canada see speed limits and exit signs in kilometers while their rental car or mental math runs on miles, so converting keeps trip timing accurate. Runners and cyclists using apps that log distance in one unit often need the other to compare results with friends or meet race requirements stated in miles.

Worked example

To convert 10 kilometers to miles, multiply 10 by 0.62137119. The calculation is 10 x 0.62137119 = 6.2137119 miles, which rounds to 6.21 miles at two decimal places. This same multiplication applies to any kilometer value entered into the converter above.

Rounding and accuracy

Use two decimal places for everyday tasks such as road trips, jogging logs, and shopping comparisons, since differences below a hundredth of a mile are imperceptible. Keep four to six decimals for engineering, surveying, aviation, or scientific work where small errors compound over long distances. When converting large values, round only the final result, never intermediate steps, to avoid accumulating rounding error.

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