Convert mph to km/h
Type the number of miles per hour that you wish to convert to kilometers per hour.
How to Convert Miles per Hour to Kilometers per Hour
The mile per hour and kilometer per hour are both units of speed. By definition, 1 mile per hour equals exactly 1.6093439987 kilometers per hour. This means to convert miles per hour to kilometers per hour, you multiply by 1.6093439987.
Formula
Step-by-Step Example
Convert 5 mph to kilometers per hour:
We need to convert miles per hour to kilometers per hour
Since 1 mph = 1.6093439987 km/h, multiply by 1.6093439987
5 × 1.6093439987 = 8.0467199936
5 mph = 8.0467199936 km/h
Mile per Hour to Kilometer per Hour Conversion Table
Quick reference table for common mile per hour to kilometer per hour conversions. Click any value for detailed calculation.
| Miles per Hour (mph) | Kilometers per Hour (km/h) |
|---|---|
| 1 mph | 1.6093439987 km/h |
| 2 mph | 3.2186879974 km/h |
| 5 mph | 8.0467199936 km/h |
| 10 mph | 16.093439987 km/h |
| 15 mph | 24.140159981 km/h |
| 20 mph | 32.186879974 km/h |
| 25 mph | 40.233599968 km/h |
| 50 mph | 80.467199936 km/h |
| 100 mph | 160.93439987 km/h |
About These Units
Mile per Hour (mph)
Miles per hour (mph) is the standard speed unit for vehicles and speed limits in the United States, United Kingdom, and a few other countries. To convert mph to km/h, multiply by 1.609. Common speeds: walking 3 mph, city driving 30 mph, highway 65-75 mph.
Kilometer per Hour (km/h)
Kilometers per hour (km/h or kph) is the standard speed unit for vehicles, speed limits, and weather in most countries worldwide. To convert km/h to mph, multiply by 0.621. Common speeds: walking 5 km/h, city driving 50 km/h, highway 120 km/h.
Frequently Asked Questions
How do I convert miles per hour to kilometers per hour?
To convert miles per hour to kilometers per hour, multiply the value by 1.6093439987. For example, 10 mph = 16.093439987 km/h.
How many kilometers per hour are in 1 mile per hour?
1 mile per hour equals 1.6093439987 kilometers per hour.
What is the formula for miles per hour to kilometers per hour?
The formula is: km/h = mph × 1.6093439987.