kmh to mph
Unit Converters

kmh to mph

Convert kilometers per hour to miles per hour (or mph to km/h) instantly. Type a value in either field and the other updates live; use the swap button to flip the direction.

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How It Works

One mile is 1.609344 kilometers, so to convert kilometers per hour to miles per hour you divide by 1.609344. To go the other way, multiply mph by 1.609344.

Frequently Asked Questions

How do I convert km/h to mph?
Divide the number of kilometers per hour by 1.609344, since one mile is exactly 1.609344 kilometers. For example, 100 km/h is about 62.14 mph.
Is the km/h to mph conversion exact?
Yes. The mile is defined as exactly 1.609344 kilometers, so the speed conversion is exact when you use that factor.
Which countries use km/h and which use mph?
Almost every country uses km/h for speed limits. The United States and the United Kingdom are the main exceptions that use mph for road speeds.

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