Unit converter
Convert miles per hour to kilometres per hour
Enter a value in miles per hour to calculate the equivalent in kilometres per hour using the authoritative EzyCalculator unit engine.
How to convert mph to km/h
Miles per hour to kilometres per hour is useful for comparing speed limits, vehicle specifications and journey speeds in countries using metric units.
Formula: km/h = mph × 1.609344
Reverse formula: mph = km/h × 0.621371
Worked example: 1 mph = 1.609344 km/h.
Useful for: Road, vehicle and travel speeds converted to kilometres per hour.
Common mph to km/h conversions
| miles per hour | kilometres per hour |
|---|---|
| 1 mph | 1.609344 km/h |
| 5 mph | 8.04672 km/h |
| 10 mph | 16.09344 km/h |
| 20 mph | 32.18688 km/h |
| 30 mph | 48.28032 km/h |
| 40 mph | 64.37376 km/h |
| 50 mph | 80.4672 km/h |
| 60 mph | 96.56064 km/h |
| 70 mph | 112.65408 km/h |
| 100 mph | 160.9344 km/h |
About the units
A mile per hour is an imperial unit represented by mph. A kilometre per hour is a metric unit represented by km/h. Calculations use the same authoritative registry as the full speed converter, retaining full precision until display.