SI unit: meter per second (m/s)
Speed Converter
Speed measures how fast an object moves - distance traveled per unit time. Common units include meters per second, kilometers per hour, and miles per hour.
Popular Speed Conversions
Reference Table
View a complete conversion table for kilometers per hour to miles per hour.
View Reference Table →Frequently Asked Questions
How do I convert km/h to mph?
Multiply km/h by 0.621371 to get mph. For example, 100 km/h equals approximately 62.14 mph.
What is the SI unit of speed?
The SI unit for speed is meter per second (m/s). One m/s equals 3.6 km/h.
How fast is 60 mph in m/s?
60 mph equals approximately 26.8224 meters per second.