Speed Converter
Convert between mph, km/h, m/s, knots, and more.
Popular speed conversions
MPH to KPH1 mph = 1.60934 km/h. US highway speed of 65 mph = 104.6 km/h. City limit 30 mph = 48.3 km/h.KPH to MPH1 km/h = 0.621371 mph. European motorway speed of 130 km/h = 80.78 mph. 100 km/h = 62.14 mph.Meters per Second to KPH1 m/s = 3.6 km/h exactly. Walking pace ≈ 1.4 m/s = 5 km/h. Olympic sprinters reach about 10 m/s.Knots to MPH1 knot (kn) = 1.15078 mph = 1.852 km/h exactly. Aircraft cruise at 450–550 kn; ships travel 12–25 kn.
Speed units
Meter per Second
m/s
Kilometer per Hour
km/h
Mile per Hour
mph
Knot
kn
Foot per Second
ft/s
What is speed?
Speed measures the rate of change of position over time.
Common use cases
- Vehicle speed conversion
- Aviation and maritime navigation
- Athletics and sports
- Wind speed reporting