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Speed units calculators
Convert distance-per-time rates without changing the measured motion.
Choose the right calculation
A speed conversion changes units rather than the underlying speed. Check statute miles versus nautical miles. Converting km/h to m/s combines both a distance and a time conversion.
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Kilometres Per Hour to Metres Per Second Converter
Convert km/h to m/s with an explicit conversion factor.
Metres Per Second to Kilometres Per Hour Converter
Convert m/s to km/h with an explicit conversion factor.
Miles Per Hour to Kilometres Per Hour Converter
Convert mph to km/h with an explicit conversion factor.
Kilometres Per Hour to Miles Per Hour Converter
Convert km/h to mph with an explicit conversion factor.
Why divide km/h by 3.6 to get m/s?
A kilometre has 1,000 metres and an hour has 3,600 seconds, giving a factor of 1,000/3,600.
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Find average speed from total distance and elapsed time.
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