Speed Converter
Convert any speed between mph, km/h, m/s and knots.
How does the speed converter work?
All speeds are converted through metres per second: 1 mph = 0.44704 m/s and 1 knot (one nautical mile per hour) = 0.5144 m/s. Mach 1 is shown at sea level and 15°C (340.29 m/s); it varies with temperature and altitude.
Convert distances with the Length Converter.
Frequently asked questions
How many km/h is 70 mph?
About 112.7 km/h.
How many mph is 100 km/h?
About 62.14 mph.
What is a knot?
One nautical mile per hour, about 1.852 km/h or 1.151 mph.
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