Convert mph to kph
Enter the value to convert from mile per hour to kilometer per hour.
How to Convert Mile per hour to Kilometer per hour
Converting mile per hour to kilometer per hour is straightforward using our conversion calculator.
Conversion Formula
km/h = mph × 1.609344Reverse conversion: Convert kph to mph
Comparison: Mile-per-hour vs Kilometer-per-hour
When to Use Each Unit
Mile-per-hour: Primary speed unit in United States for transportation, weather, and general speed measurements.
Kilometer-per-hour: Primary speed unit for road transportation, weather reporting, and general speed measurements in metric countries.
Common Conversion Values
- 1 mph ≈ 1.609 km/h
- 1 mph ≈ 0.447 m/s
- 1 mph ≈ 1.467 ft/s
- 1 mph ≈ 0.869 knots
About Mile
Definition: The mile per hour (symbol: mph) expresses speed as the number of miles traveled in one hour.
History: Developed with imperial measurement system and automotive era. Standard in United States and some Commonwealth countries.
Current Use: Primary speed unit in United States for transportation, weather, and general speed measurements.
Examples: City speed: 25-35 mph, highway: 55-80 mph, running: 6-15 mph, hurricane winds: 74+ mph
About Kilometer
Definition: The kilometer per hour (symbol: km/h) expresses speed as the number of kilometers traveled in one hour.
History: Developed with automotive transportation and became standard speed unit in most countries using metric system.
Current Use: Primary speed unit for road transportation, weather reporting, and general speed measurements in metric countries.
Examples: City driving: 50 km/h, highway: 100-130 km/h, cycling: 15-40 km/h, wind speed: 10-50 km/h