Speed Converter
Convert speed between kilometers per hour, miles per hour, meters per second and knots.
100 kmh =
62.137119 mph
Meters per second (m/s)27.777778
Miles per hour (mph)62.137119
Knots (kn)53.99568
Feet per second (ft/s)91.134442
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How it works
Values are converted via meters per second: 1 km/h = 0.2778 m/s, 1 mph = 0.44704 m/s, 1 knot = 0.5144 m/s.
Example
100 km/h ≈ 62.14 mph. 30 knots ≈ 55.56 km/h.
Frequently asked questions
How do I convert km/h to mph?
Divide by 1.609344. 120 km/h ≈ 74.6 mph.
What is a knot?
One nautical mile per hour, used at sea and in aviation.
Is m/s used in weather forecasts?
Yes, many countries report wind speed in m/s.