km/h to mph – convert kilometres per hour to miles per hour
Convert km/h to mph (kilometres per hour to miles per hour) for driving, running, cycling or treadmill speeds. This page opens the main speed converter with km/h → mph pre-selected so you can type any metric speed and see it in mph.
Open the interactive km/h → mph converter:
Use main converter (km/h → mph) or switch to mph → km/hThe homepage also supports m/s, knots and ft/s. The Tool Hub gives you timers and alarms to track workouts or driving breaks.
Quick reference: km/h to mph
The exact factor is 1 km/h ≈ 0.621371 mph, so: mph = km/h × 0.621371.
| km/h | mph (approx.) |
|---|---|
| 30 km/h | 18.64 mph |
| 50 km/h | 31.07 mph |
| 80 km/h | 49.71 mph |
| 100 km/h | 62.14 mph |
| 110 km/h | 68.35 mph |
| 130 km/h | 80.78 mph |
How to convert km/h to mph
Use either of these:
mph = km/h × 0.621371
or mph = km/h ÷ 1.609344
Examples:
- 50 km/h ÷ 1.609344 ≈ 31.07 mph
- 90 km/h × 0.621371 ≈ 55.92 mph
- 120 km/h × 0.621371 ≈ 74.56 mph
Why convert kilometres per hour to miles per hour?
- Driving in a country where speed limits are posted in mph.
- Comparing European car reviews (km/h) with US ones (mph).
- Matching treadmill or bike computer readouts to mph-based training plans.
- Understanding speed camera thresholds or safety distances in another unit system.
More speed converters on this site
Internally, all speeds convert via metres per second, so km/h, mph, knots and ft/s all stay consistent.