Kilometers per Hour to Miles per Hour Converter
1 kilometer per hour ≈ 0.621371192 miles per hour
1 kilometer per hour equals 0.621371 miles per hour
How to convert kilometers per hour to miles per hour
Speed combines distance and elapsed time. Knots use the international nautical mile (1852 m), and mph uses the international statute mile (1609.344 m).
mph = km/h × 0.6213711922One kilometer per hour is 0.6213711922 miles per hour, so a single multiplication converts any value.
6.21371 mph ≈ 10 × 0.6213711922Kilometers per hour to miles per hour conversion table
Common values in kilometers per hour, converted to miles per hour.
| Kilometers per hour (km/h) | Miles per hour (mph) |
|---|---|
| 1 | 0.62137119 |
| 2 | 1.2427424 |
| 3 | 1.8641136 |
| 4 | 2.4854848 |
| 5 | 3.106856 |
| 10 | 6.2137119 |
| 20 | 12.427424 |
| 25 | 15.53428 |
| 50 | 31.06856 |
| 100 | 62.137119 |
| 250 | 155.3428 |
| 500 | 310.6856 |
| 1,000 | 621.37119 |
About these units
kilometer per hourkm/h
The standard road-speed unit in most of the world.
mile per hourmph
The standard road-speed unit in the United States and the United Kingdom.
Sources and precision
Table results are rounded to 8 significant digits; formula constants may be rounded to 10. Worked example answers use 6 significant digits. The converter starts at 6 significant digits and lets you change display precision. Calculations use the stored factors without intermediate rounding. Exact unit definitions do not make an input measurement more precise; conventional and measured factors follow the assumptions stated here.