Miles per Hour to Kilometers per Hour Converter
1 mile per hour = 1.609344 kilometers per hour
1 mile per hour equals 1.60934 kilometers per hour
How to convert miles per hour to kilometers 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).
km/h = mph × 1.609344One mile per hour is 1.609344 kilometers per hour, so a single multiplication converts any value.
16.0934 km/h ≈ 10 × 1.609344Miles per hour to kilometers per hour conversion table
Common values in miles per hour, converted to kilometers per hour.
| Miles per hour (mph) | Kilometers per hour (km/h) |
|---|---|
| 1 | 1.609344 |
| 2 | 3.218688 |
| 3 | 4.828032 |
| 4 | 6.437376 |
| 5 | 8.04672 |
| 10 | 16.09344 |
| 20 | 32.18688 |
| 25 | 40.2336 |
| 50 | 80.4672 |
| 100 | 160.9344 |
| 250 | 402.336 |
| 500 | 804.672 |
| 1,000 | 1,609.344 |
About these units
mile per hourmph
The standard road-speed unit in the United States and the United Kingdom.
kilometer per hourkm/h
The standard road-speed unit in most of the world.
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.