Speed conversion
Kilometres per hour to Miles per hour (km/h to mph)
1 km/h = 0.6214 mph — multiply the number of kilometres per hour by 0.6214.
Kilometres per hour to Miles per hour conversion chart
| kilometres per hour | miles per hour |
|---|---|
| 10 km/h | 6.2137 mph |
| 20 km/h | 12.4274 mph |
| 30 km/h | 18.6411 mph |
| 40 km/h | 24.8548 mph |
| 50 km/h | 31.0686 mph |
| 60 km/h | 37.2823 mph |
| 70 km/h | 43.496 mph |
| 80 km/h | 49.7097 mph |
| 90 km/h | 55.9234 mph |
| 100 km/h | 62.1371 mph |
| 110 km/h | 68.3508 mph |
| 120 km/h | 74.5645 mph |
| 130 km/h | 80.7783 mph |
| 200 km/h | 124.274 mph |
How to convert by hand
1 km/h = 0.621371192 mph
Because this is a linear conversion, the ratio never changes: every kilometres per hour is always 0.6214 mph, whatever the size of the number.
Worked example: 100 km/h × 0.6214 = 62.1371 mph .
Related conversions
About kilometres per hour and miles per hour
Speed conversions are mostly a driving problem: rental cars, speed limits and satnav settings switch between km/h and mph at borders.
Kilometre per hour
MetricDistance in kilometres travelled in one hour.
Commonly used for: Speed limits and vehicle speedometers in most countries.
Mile per hour
US / ImperialDistance in miles travelled in one hour.
Commonly used for: Speed limits in the US and UK.
Questions
How many miles per hour are in one kilometres per hour?
One kilometres per hour equals 0.6214 mph. To convert any amount, multiply the number of kilometres per hour by 0.6214.
What is 50 km/h in mph?
50 km/h = 31.0686 mph. Type any value into the converter above to get an exact answer.
How do I convert miles per hour back to kilometres per hour?
Divide by 0.6214 instead of multiplying — or use our Miles per hour to Kilometres 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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