Unit Kit
Free Speed Converter — MPH, KM/H, Knots & M/S
Convert between 6 speed units including mph, km/h, knots, m/s, feet per second, and Mach. Instant results, no sign-up.
FAQ
What speed units are supported?
Six units: meters per second, kilometers per hour, miles per hour, feet per second, knot, and Mach.
How do I convert mph to km/h?
Multiply mph by 1.60934. For example, 60 mph = 96.56 km/h.
What is a knot?
A knot equals 1 nautical mile per hour (1.852 km/h). It is used in aviation and maritime navigation.
What is Mach speed?
Mach 1 equals the speed of sound, approximately 343 m/s or 1235 km/h at sea level.
Which countries use mph?
The US, UK, and a few other countries use miles per hour for road speed limits.