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Mile / hour to Kilometer / hour

Convert mile / hour (mph) to kilometer / hour (km/h) — with the exact factor, a quick-reference table and a free converter that works offline.

1 mph = 1.609344 km/h

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Conversion table

Mile / hour (mph)Kilometer / hour (km/h)
1 mph1.609344 km/h
2 mph3.218688 km/h
5 mph8.04672 km/h
10 mph16.09344 km/h
20 mph32.18688 km/h
50 mph80.4672 km/h
100 mph160.9344 km/h
500 mph804.672 km/h

How the conversion works

Both units measure speed. One mile / hour equals exactly 1.609344 km/h, so multiply by that factor to convert.

FAQ

How many kilometer / hours in a mile / hour?

1 mph = 1.609344 km/h.

How do I convert mile / hour to kilometer / hour?

Multiply the mile / hour value by 1.609344. For example, 10 mph × 1.609344 = 16.09344 km/h.

Where does the factor come from?

The conversion factor is defined in NIST SP 811; both units are speed units converted through meter / second.

Related conversions

Kilometer / hour to Mile / hour Knot to Mile / hour Mile / hour to Knot Meter / second to Kilometer / hour

Conversion factors: NIST SP 811. Computed by the same engine that powers the app.

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