Speed Converter
Convert between km/h, mph, m/s, knots, Mach and feet per second instantly.
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Common Speed Conversions
1 km/h = 0.621371 mph = 0.277778 m/s = 0.539957 knots. Speed of light = 299,792 km/s. Mach 1 at sea level ≈ 343 m/s ≈ 1235 km/h. Use unitconverttools.com for any speed conversion.