MPH to Kilometers per hour Converter
Convert miles per hour to kilometers per hour instantly. Free online calculator.
Quick reference:
1 mph = 1.609344 km/h
Tip: You can swap the direction to convert km/h → mph.
About Miles per hour and Kilometers per hour
Miles per hour (mph) is a unit of length in the metric system. It is commonly used for everyday measurements such as body height, fabric, furniture, and small distances.
Kilometers per hour (km/h) is a unit of length in the imperial/US customary system. It is widely used in the United States and in many industries (construction, screens, tools) where inches are standard.
Conversion formulas
- 1 mph = 1.609344 km/h
- 1 km/h = 0.6213711922 mph
Tip: You can swap the direction if you want to convert km/h → mph.