Mach is stated at sea-level conditions (343 m/s). The true speed of sound drops with altitude and temperature, so treat Mach figures as indicative, not navigational.
Convert miles and kilometres per hour to metres per second, feet per second and knots — for driving, running, cycling, sailing, aviation and wind speeds.
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Convert miles and kilometres per hour to metres per second, feet per second and knots — for driving, running, cycling, sailing, aviation and wind speeds.
A car travelling at 100 km/h is moving at 62.14 mph — covering 27.78 metres every second.
Result = input × source-unit factor ÷ destination-unit factor. All factors are relative to the same base unit; intermediate values are not rounded.
Metres/second, Kilometres/hour, Miles/hour, Feet/second, Knots, Mach (sea level). Read the labels carefully: regional or decimal/binary variants are separate choices.
One nautical mile per hour. A nautical mile is exactly 1,852 metres — one minute of arc around the Earth — so a knot is 1.852 km/h.
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