MPH to KM/H Converter
Multiply a speed in miles per hour by 1.609344 to get kilometers per hour. 60 mph = 96.56064 km/h, so a car doing 60 mph is traveling at a little over 96 km/h.
Kilometers per hour is also written kmh or kph, so mph to kmh and mph to kph are the same conversion. You can type in either box below.
Runs in your browser. Conversions are calculated on your own device, and nothing you enter is sent to a server. This page opens the Unit Converter with this conversion selected, so you can change either unit.
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(opens in a new tab)How to convert miles per hour to kilometers per hour
Formula: kilometers per hour = miles per hour × 1.609344
The constant is exact by definition: 1 mile per hour = 1.609344 kilometers per hour. It is not a rounded approximation.
The factor comes from the length of the mile, not from anything about speed. One international mile is exactly 1.609344 kilometers, and both units are measured per hour, so the hours cancel and the same 1.609344 applies.
Worked example: 60 mph to kilometers per hour
This result is complete, not rounded.
Convert 60 mph
Input
60 mph
Output
60 × 1.609344 = 96.56064 km/h
Common miles per hour to kilometers per hour conversions
| Miles per hour (mph) | Kilometers per hour (km/h) |
|---|---|
| 1 mph | 1.609344 km/h |
| 5 mph | 8.04672 km/h |
| 10 mph | 16.09344 km/h |
| 20 mph | 32.18688 km/h |
| 30 mph | 48.28032 km/h |
| 50 mph | 80.4672 km/h |
| 60 mph | 96.56064 km/h |
| 70 mph | 112.65408 km/h |
| 100 mph | 160.9344 km/h |
When you need to convert miles per hour to kilometers per hour
- Driving abroad: a car with a speedometer in mph, on roads signed in km/h, or the other way round.
- Speed limits: 30 mph = 48.28032 km/h and 70 mph = 112.65408 km/h.
- Car specifications and reviews that quote top speeds in mph.
- Running and cycling: a treadmill or bike computer set to mph, compared with a training plan in km/h.
Things worth knowing
- Converted speed limits are rarely round numbers, and the limits printed on signs in each country are set separately. Always follow the posted limit where you are driving, not a converted figure.
- This page converts speeds, not running paces. A pace such as 8 minutes per mile is time per distance, so it does not convert by multiplying by 1.609344.
Converting back and related converters
To go the other way, use the KM/H to MPH Converter, which applies miles per hour = kilometers per hour / 1.609344. For any other pair of units, open the Unit Converter, or browse every unit converter.
- Miles to KM Converter: to convert a road distance rather than a speed.
- KM to Miles Converter: for distances on kilometer-based maps and signs.
Frequently asked questions
How many km/h is 60 mph?
60 mph = 96.56064 km/h. Multiply the miles per hour by 1.609344, which is exact, so this result is complete.
Is KPH the same as KM/H?
Yes. KPH, kph, kmh, km/h and km/hr all mean kilometers per hour. The converter and this page use the symbol km/h.
How do I convert mph to km/h in my head?
Multiply by 1.6. For 50 mph that gives 80 km/h, against an exact 80.4672 km/h. The shortcut runs about 0.6 percent low.
Why is the factor the same as for miles to kilometers?
Both speeds are a distance per hour. Converting the distance part from miles to kilometers is the only change, so the factor is the length of one mile in kilometers.