Speed ConversionsUse this easy and mobile-friendly calculator to convert between various units of Speed.
1 Mile per Hour =
1.609344 Kilometers per Hour
Miles per HourA mile per hour is a unit of speed commonly used in the United States. It is equal to exactly 1.609344 kilometers per hour.
Ordinary abbreviations: mph, mi/h
Kilometers per HourA kilometer per hour is a unit of speed. Something traveling at one kilometer per hour is traveling about 0.278 meters per second, or about 0.621 miles per hour.
Ordinary abbreviations: km/h, kmph, km/hr, km/hour