Work out metres per second to kilometres per hour instantly with clear inputs, formula shown and shareable results.
Converting Metres per second to Kilometres per hour is one multiplication: a single m/s is 3.6 km/h, so the amount is scaled by that factor. Reversing the direction divides by the same factor. The factor is an exact definition rather than a rounded figure, so the result stays precise at any magnitude. There are 3,600 seconds in an hour and 1,000 metres in a kilometre, so the factor is 3600/1000 = 3.6 exactly.
Metres per second → Kilometres per hour
km/h = m/s × 3.6
Kilometres per hour → Metres per second
m/s = km/h ÷ 3.6
One m/s equals 3.6 km/h. That value is exact by definition.
Divide by 3.6 rather than multiplying, or flip the direction selector which does it for you.