KM to Miles Converter

Enter a distance in kilometres to see the equivalent in international miles — the mile used on US road signs.

How it works

The international mile is defined as exactly 1 609.344 metres, which is 1.609344 kilometres. Dividing kilometres by that constant yields miles. This is not the nautical mile (1 852 m) used in aviation and marine navigation.

Formula

miles = kilometres ÷ 1.609344

Worked examples

100 km → 62.1371 mi
5 km → 3.1069 mi

Useful notes

100 km ≈ 62.1371 miles.
A 5 km parkrun is about 3.1069 miles.

FAQ

How many miles is 100 km?: 100 ÷ 1.609344 ≈ 62.1371 miles.
Is this a nautical mile?: No. A nautical mile is 1 852 metres. This converter uses the international statute mile of 1 609.344 metres.
How do I convert km to miles roughly in my head?: Multiply by 0.62 for a quick estimate (100 km ≈ 62 miles). Use this calculator when you need the defined conversion.

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