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Kilometers to miles

Convert kilometers to miles in one step. One kilometer is about 0.621 miles, one mile exactly 1.609344 kilometers.

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How it works

  1. Enter the valueThe units are already set. Type the number.
  2. Read the resultThe converted value appears at once.
  3. Use the tableThe reference table below lists common values.

How to convert km to miles

The international mile is exactly 1,609.344 meters. Divide kilometers by 1.609344, or multiply by about 0.621371: a 5 km run is 3.11 miles, a 10 km run 6.21 miles, a half marathon of 21.1 km is 13.1 miles and a marathon of 42.195 km is 26.2 miles.

Road signs in the US and the UK use miles, while almost every other country uses kilometers. When renting a car abroad or comparing running and cycling distances, use the table below the converter; switch the To unit to nautical miles for sailing and aviation.

Speed

For speed limits, choose Speed in the categories: 100 km/h is 62 mph, 120 km/h is 75 mph.

Frequently asked questions

How many miles is 1 km?

1 kilometer is 0.621371 miles.

How accurate are the conversions?

They use the exact international definitions and show up to 12 significant digits.

Why does my 1 TB drive show 931 GB?

Drive makers count 1 TB as 10^12 bytes, operating systems count in binary units. 10^12 bytes are 931 GiB.

Can I type a comma as decimal separator?

Yes. Both 1,5 and 1.5 are understood.

Does it work offline?

Yes. After the first visit the converter also works without an internet connection.