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Miles per Hour to Kilometers per Hour Converter (mph to km/h)

1 mph = 1.609344 km/h. Type any value to convert miles per hour to kilometers per hour.

1 mph = 1.609344 km/h

Formula: km/h = mph × 1.609344

Common values
Decimals
In every unit 7 units
Meter per second (m/s) 0.44704 m/s
Kilometer per hour (km/h) 1.609344 km/h
Mile per hour (mph) 1 mph
Knot (kn) 0.8689762419 kn
Foot per second (ft/s) 1.466666667 ft/s
Mach (Mach) 0.001313687576 Mach
Speed of light (c) 1.491164931 × 10⁻⁹ c

Convert on our server?

If you continue, the file is uploaded over an encrypted connection and converted on our server. You can keep using the site meanwhile. The original is deleted as soon as it is converted; the result is kept for 6 hours so you can download it, and you can delete it at any time. Files are never shared or used for anything else.

Calculated in your browser – nothing you type is sent anywhere. Privacy details

Miles per hour to kilometers per hour table

Formula: km/h = mph × 1.609344

Mile per hour (mph)Kilometer per hour (km/h)
0.1 mph0.1609344 km/h
0.25 mph0.402336 km/h
0.5 mph0.804672 km/h
1 mph1.609344 km/h
2 mph3.218688 km/h
3 mph4.828032 km/h
4 mph6.437376 km/h
5 mph8.04672 km/h
6 mph9.656064 km/h
7 mph11.265408 km/h
8 mph12.874752 km/h
9 mph14.484096 km/h
10 mph16.09344 km/h
12 mph19.312128 km/h
15 mph24.14016 km/h
20 mph32.18688 km/h
25 mph40.2336 km/h
30 mph48.28032 km/h
40 mph64.37376 km/h
50 mph80.4672 km/h
60 mph96.56064 km/h
75 mph120.7008 km/h
100 mph160.9344 km/h
150 mph241.4016 km/h
200 mph321.8688 km/h
250 mph402.336 km/h
500 mph804.672 km/h
1,000 mph1,609.344 km/h

How to use: Miles per Hour to Kilometers per Hour

  1. 1 Type the value in miles per hour.
  2. 2 The result in kilometers per hour appears at once – or type in the kilometers per hour field to convert back.
  3. 3 Pick a common value, round to fewer decimals or swap the units with one click.
  4. 4 Copy the result, or open “In every unit” to see the value in all units of speed.

About this tool

Mile per hour (mph) is a unit of speed (imperial and US customary); 1 mph = 0.44704 m/s. Kilometer per hour (km/h) is a unit of speed (metric, accepted for use with the SI); 1 km/h = 0.2777777778 m/s.

To convert miles per hour to kilometers per hour, multiply the value by 1.609344 (km/h = mph × 1.609344). Example: 50 mph = 80.4672 km/h.

Calculated in your browser – nothing you type is sent anywhere.

Frequently asked questions

How do I convert miles per hour to kilometers per hour?

To convert miles per hour to kilometers per hour, multiply the value by 1.609344: km/h = mph × 1.609344. For example 50 mph = 80.4672 km/h.

What is 1 mph in kilometers per hour?

1 mph = 1.609344 km/h. The other way round, 1 km/h = 0.6213711922 mph.

How exact is the result?

The converter uses the official definitions of both units and shows up to 10 significant digits; choose 0–6 decimals to round. Both units are defined exactly in terms of each other, so the factor itself is exact.

Can I convert other units of speed here?

Yes – choose any of the 7 units of speed in the From and To lists, or switch to another measurement at the top.

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