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How to Convert Kilometers per Hour to Miles per Hour
Multiply the km/h value by 0.621371. This is the reciprocal of the miles-to-kilometers distance factor.
Kilometers per Hour to Miles per Hour Conversion Table
| Kilometers per Hour | Miles per Hour |
|---|---|
| 0.5 | 0.310686 |
| 1 | 0.621371 |
| 2 | 1.24274 |
| 5 | 3.10685 |
| 10 | 6.21371 |
| 15 | 9.32057 |
| 20 | 12.4274 |
| 25 | 15.5343 |
| 50 | 31.0686 |
| 100 | 62.1371 |
| 250 | 155.343 |
| 500 | 310.685 |
| 1000 | 621.371 |
How Many Miles per Hour in a Kilometers per Hour?
1 kilometers per hour equals 0.621371 miles per hour. To convert any value, multiply the number of kilometers per hour by 0.621371.
Common Use Cases
International visitors driving in the United States or United Kingdom need to convert their intuitive km/h sense of speed to mph for obeying posted limits. Knowing that 100 km/h is about 62 mph prevents confusion when a US highway limit reads 65 mph, which is actually slightly faster than the 100 km/h many European drivers consider their standard cruising speed.
Cycling fans following the Tour de France, Giro d'Italia, or other international races see average stage speeds reported in km/h. A peloton averaging 45 km/h is traveling at about 28 mph, a figure that makes more intuitive sense to American cyclists who track their own ride speeds in miles per hour on bike computers.
Soccer and cricket broadcasters increasingly show ball-speed data in km/h, but American baseball fans think in mph. A cricket fast bowler delivering at 150 km/h is throwing at about 93.2 mph, a comparison that lets US sports fans appreciate the athleticism involved by relating it to Major League Baseball pitch speeds they already understand.