# Kilometers to miles Enter a distance in kilometers to see it in miles. One kilometer equals 0.621371 miles. To convert kilometers to miles, multiply the number of kilometers by 0.621371. ## How the conversion works ``` miles = kilometers × 0.621371 ``` The factor comes from the definition of the international mile, which is exactly 1,609.344 metres. Divide one kilometer by that and you get 0.6213711922 miles, which is where the rounded 0.621371 you see everywhere comes from. ### A worked example A 42.195 km marathon: 42.195 × 0.621371 = 26.219 miles. That is the familiar 26.2 mile figure, and it is where the odd marathon distance comes from — the race was standardised in miles first. ## Reference table Common kilometer to mile conversions. | Kilometers | Miles | |---|---| | 1 km | 0.62137 | | 2 km | 1.24274 | | 3 km | 1.86411 | | 5 km | 3.10686 | | 10 km | 6.21371 | | 15 km | 9.32057 | | 20 km | 12.42742 | | 25 km | 15.53428 | | 30 km | 18.64114 | | 50 km | 31.06856 | | 75 km | 46.60284 | | 100 km | 62.13712 | | 150 km | 93.20568 | | 200 km | 124.27424 | | 500 km | 310.6856 | | 1000 km | 621.37119 | ## Doing it in your head Multiplying by 0.6 gets you within about 3.5%, which is close enough for reading a road sign. For a much closer answer, multiply by five and divide by eight: 80 km becomes 400 ÷ 8 = 50 miles, against a true 49.7. That trick stays within 0.6% at any distance. Going the other way? Use the miles to kilometers converter . ## Next steps - [convert miles to kilometers](https://www.kilometer-mileage.com/miles-to-km.html) - [convert a speed limit instead of a distance](https://www.kilometer-mileage.com/kmh-to-mph.html) - [why the mile is exactly 1,609.344 metres](https://www.kilometer-mileage.com/about.html) ## Common questions