Speed Converter
km/h, mph, knots and m/s.
Conversion
Miles per Hour to Kilometers per Hour Converter
1 mile per hour = 1.609344 km/h. Enter any value to convert miles per hour (mph) to kilometers per hour (km/h), or use the table below for common values.
Formula
km/h = mph × 1.609344
Example: 10 mph = 16.09344 km/h. To convert the other way, use mph = km/h × 0.6213711922.
Quick mental estimate: multiply by about 1.6.
Miles per Hour to Kilometers per Hour conversion table
| Miles per Hour (mph) | Kilometers per Hour (km/h) |
|---|---|
| 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 |
| 80 mph | 128.74752 km/h |
| 90 mph | 144.84096 km/h |
| 100 mph | 160.9344 km/h |
| 120 mph | 193.12128 km/h |
| 150 mph | 241.4016 km/h |
| 200 mph | 321.8688 km/h |
| 300 mph | 482.8032 km/h |
About miles per hour and kilometers per hour
Miles per hour is the road speed unit in the United States and the United Kingdom.
Kilometers per hour is the speed unit on road signs and speedometers in most of the world.
Other Speed conversions
Kilometers per Hour → Miles per HourReverse conversionMiles per Hour → Meters per Secondmph → m/sMiles per Hour → Feet per Secondmph → ft/sMiles per Hour → Knotsmph → knMeters per Second → Kilometers per Hourm/s → km/hFeet per Second → Kilometers per Hourft/s → km/hKnots → Kilometers per Hourkn → km/h
Frequently asked questions
How do I convert miles per hour to kilometers per hour?
Use the formula km/h = mph × 1.609344. For example, 10 mph = 16.09344 km/h.
What is 1 mile per hour in kilometers per hour?
1 mph = 1.609344 km/h.
How do I convert kilometers per hour back to miles per hour?
Use mph = km/h × 0.6213711922. 1 km/h = 0.6213711922 mph.