Miles to KM Converter

Enter a distance in miles to get kilometres. Handy for race distances, road trips and converting a US odometer reading.

How it works

Because the international mile is exactly 1.609344 km, converting miles to kilometres is a multiplication, not a lookup table. A marathon marked 26.2 miles is 26.2 × 1.609344 = 42.1648128 km — slightly longer than the official 42.195 km marathon, which is why road races are measured to the metric standard rather than 26.2 on the nose.

Formula

kilometres = miles × 1.609344

Worked examples

1 mi → 1.6093 km
26.2 mi → 42.1648 km

Useful notes

1 mile = 1.609344 km exactly.
This is the land (statute) mile, not a nautical mile.

FAQ

How many kilometres is one mile?: Exactly 1.609344 kilometres.
How many kilometres is a 26.2 mile marathon?: 26.2 × 1.609344 = 42.1648 km. The World Athletics marathon is 42.195 km, a slightly different figure.
Can I just multiply by 1.6?: 1.6 is a convenient estimate (0.6% low). This page uses 1.609344 so the reverse conversion matches exactly.

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