Speed conversion
Miles per hour to Kilometres per hour (mph to km/h)
1 mph = 1.6093 km/h — multiply the number of miles per hour by 1.6093.
Miles per hour to Kilometres per hour conversion chart
| miles per hour | kilometres per hour |
|---|---|
| 5 mph | 8.0467 km/h |
| 10 mph | 16.0934 km/h |
| 20 mph | 32.1869 km/h |
| 25 mph | 40.2336 km/h |
| 30 mph | 48.2803 km/h |
| 40 mph | 64.3738 km/h |
| 50 mph | 80.4672 km/h |
| 55 mph | 88.5139 km/h |
| 60 mph | 96.5606 km/h |
| 65 mph | 104.607 km/h |
| 70 mph | 112.654 km/h |
| 75 mph | 120.701 km/h |
| 80 mph | 128.748 km/h |
| 100 mph | 160.934 km/h |
How to convert by hand
1 mph = 1.609344 km/h
Because this is a linear conversion, the ratio never changes: every miles per hour is always 1.6093 km/h, whatever the size of the number.
Worked example: 65 mph × 1.6093 = 104.607 km/h .
Related conversions
About miles per hour and kilometres per hour
Speed conversions are mostly a driving problem: rental cars, speed limits and satnav settings switch between km/h and mph at borders.
Mile per hour
US / ImperialDistance in miles travelled in one hour.
Commonly used for: Speed limits in the US and UK.
Kilometre per hour
MetricDistance in kilometres travelled in one hour.
Commonly used for: Speed limits and vehicle speedometers in most countries.
Questions
How many kilometres per hour are in one miles per hour?
One miles per hour equals 1.6093 km/h. To convert any amount, multiply the number of miles per hour by 1.6093.
What is 30 mph in km/h?
30 mph = 48.2803 km/h. Type any value into the converter above to get an exact answer.
How do I convert kilometres per hour back to miles per hour?
Divide by 1.6093 instead of multiplying — or use our Kilometres per hour to Miles per hour converter.
Is this converter accurate?
Yes. Linear conversions use the internationally agreed factors published by NIST (SP 811), and temperature conversions use the exact defining formulas. Calculations run at full double precision and are only rounded for display.
Need a different unit?
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