How to convert miles per hour to kilometers per hour
Formula: km/h = mph × 1.60934
Worked example: 65 mph → 65 × 1.60934 = 104.607 km/h
Multiply mph by 1.609344, the exact number of kilometers in a mile, or by 1.6 for a quick estimate. A 65 mph US limit is 104.6 km/h and a 70 mph UK limit is 112.7 km/h.
Miles per hour to kilometers per hour conversion chart
| Miles per hour (mph) | Kilometers per hour (km/h) |
|---|---|
| 5 mph | 8.04672 km/h |
| 10 mph | 16.0934 km/h |
| 15 mph | 24.1402 km/h |
| 20 mph | 32.1869 km/h |
| 25 mph | 40.2336 km/h |
| 30 mph | 48.2803 km/h |
| 35 mph | 56.327 km/h |
| 40 mph | 64.3738 km/h |
| 45 mph | 72.4205 km/h |
| 50 mph | 80.4672 km/h |
| 55 mph | 88.5139 km/h |
| 60 mph | 96.5606 km/h |
| 65 mph | 104.607 km/h |
| 70 mph | 112.654 km/h |
| 75 mph | 120.701 km/h |
| 80 mph | 128.748 km/h |
| 100 mph | 160.934 km/h |
What is a mile per hour?
The mile per hour is the unit of speed limits in the United States and the United Kingdom. Since a mile is exactly 1.609344 km, 1 mph is exactly 1.609344 km/h. Baseball pitches, wind speeds in US forecasts and treadmill displays also use mph.
What is a kilometer per hour?
The kilometer per hour is the speed unit on road signs and speedometers in most of the world, including Canada and Mexico. A highway limit of 100 km/h is about 62 mph, and 50 km/h, a common city limit, is about 31 mph.