Miles Per Hour to Kilometers Per Hour (mph to km/h)
1 mile per hour = 1.609344 kilometers per hour
How to convert miles per hour to kilometers per hour
km/h = mph × 1.609344
Example: 5 × 1.609344 = 8.0467, so 5 miles per hour = 8.0467 kilometers per hour.
Mph to km/h is needed when reading US or UK speed limits, car specifications or weather reports of wind speed.
The UK motorway limit of 70 mph is about 113 km/h, and the common US limit of 65 mph is about 105 km/h. Multiply by 1.6 for a good estimate.
Miles Per Hour to Kilometers Per Hour conversion table
| Miles Per Hour (mph) | Kilometers Per Hour (km/h) |
|---|---|
| 5 mph | 8.0467 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 | 104.6074 km/h |
| 70 mph | 112.6541 km/h |
| 75 mph | 120.7008 km/h |
| 80 mph | 128.7475 km/h |
| 100 mph | 160.9344 km/h |
| 150 mph | 241.4016 km/h |
What is a mile per hour?
Miles per hour is the road speed unit in the United States and the United Kingdom. One mph is exactly 1.609344 km/h, because the mile is defined as 1,609.344 meters.
What is a kilometer per hour?
Kilometers per hour is the speed unit on road signs and speedometers in most countries. Dividing by 3.6 gives meters per second, the SI unit used in physics.
Frequently asked questions
How many kilometers per hour are in one mile per hour?
One mile per hour equals 1.609344 kilometers per hour.
How do I convert miles per hour to kilometers per hour?
Use the formula km/h = mph × 1.609344. 5 × 1.609344 = 8.0467, so 5 miles per hour = 8.0467 kilometers per hour.
What is 150 mph in km/h?
150 mph = 241.4016 km/h.
How do I convert kilometers per hour back to miles per hour?
Use the inverse formula mph = km/h ÷ 1.609344, or open the Kilometers Per Hour to Miles Per Hour converter.