SPEED CONVERSION
Kilometer per hour to Mile per hour.
Convert kilometer per hour (km/h) to mile per hour (mph), with the math explained.
1 km/h = 0.6213711922 mph
THE MATH, MADE SIMPLE
How to convert kilometer per hour to mile per hour
Multiply your kilometer per hour value by 0.621371192237 to get the equivalent in mile per hour. Both units are normalized through the meter per second.
mph = km/h × 0.621371192210 km/h = 6.21371192237 mph
Result rounded to 12 significant digits. Change the precision in the calculator to suit your task.QUICK REFERENCE
km/h to mph conversion table
| Kilometer per hour (km/h) | Mile per hour (mph) |
|---|---|
| 1 km/h | 0.621371192237 mph |
| 2 km/h | 1.24274238447 mph |
| 5 km/h | 3.10685596119 mph |
| 10 km/h | 6.21371192237 mph |
| 20 km/h | 12.4274238447 mph |
| 50 km/h | 31.0685596119 mph |
| 100 km/h | 62.1371192237 mph |
| 500 km/h | 310.685596119 mph |
| 1,000 km/h | 621.371192237 mph |
About the kilometer per hour
The kilometer per hour (km/h) is a unit of speed. One kilometer per hour equals 0.277777777778 meter per second (base unit) in this calculator.
All kilometer per hour conversionsAbout the mile per hour
The mile per hour (mph) is a unit of speed. One mile per hour equals 0.44704 meter per second (base unit) in this calculator.
All mile per hour conversionsCommon questions
What is 1 km/h in mph?
One kilometer per hour equals 0.621371192237 mph. Use the formula above for other values.
Why might another calculator show a different last digit?
Calculators may round at different stages or use different unit conventions. We keep full JavaScript numeric precision during calculation and round only for display. Choose up to 15 significant digits. Check US versus UK units and the notes for this category.
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