Speed Converter
Convert between mph, km/h, knots, meters per second, and Mach number. Compare speeds across different measurement systems.
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Notes
Mach number is calculated at sea level and standard temperature (15°C / 59°F), where the speed of sound is approximately 767 mph (343 m/s).
Knots are used in aviation and maritime navigation. 1 knot = 1 nautical mile per hour.