Convert between miles and kilometers in JavaScript - 30 Seconds Of Code

Miles to kilometers

In order to convert from miles to kilometers, you can use the conversion formula km = mi * 1.609344.

<latex-expression>

math

km = mi \times 1.609344

</latex-expression>

const milesToKm = miles => miles * 1.609344;

milesToKm(5); // ~8.04672

Conversely, the conversion formula from kilometers to miles is mi = km * 0.621371.

<latex-expression>

math

mi = km \times 0.621371

</latex-expression>

const kmToMiles = km => km * 0.621371;

kmToMiles(8.1) // 5.0331051