Convert Kilometers per Hour to Meters per Second

About converting Kilometers per Hour to Meters per Second

Kilometers per Hour (km/h) and Meters per Second (m/s) are both units of speed, so converting between them is a single multiplication: multiply your Kilometers per Hour figure by 0.2778. Ten Kilometers per Hour comes to 2.7778 Meters per Second, and a hundred works out at 27.7778 Meters per Second.

Rule of thumb: going from Kilometers per Hour to Meters per Second divides, so the figure always shrinks — it takes about 3.6 Kilometers per Hour to make a single Meter per Second. If your answer came out bigger, you have the conversion the wrong way round.

What is a Kilometer per Hour?

The kilometer per hour is the road-speed unit of nearly every country on Earth: the number on the speedometer, the number on the sign, the number in the ticket. It is a compound unit rather than a fundamental one — a distance divided by a time — and that is precisely why it took hold, because people already thought in kilometers and in hours and so needed no new idea to think in km/h. Its only real rivals are mph, which clings on in the United States and the United Kingdom, and the knot, which owns the sea and the sky.

What is a Meter per Second?

The meter per second is the SI unit of speed and the one physics actually runs on — every equation involving velocity, momentum or acceleration expects it, and acceleration itself is measured in meters per second, per second. Yet almost nobody quotes a journey in it. Drivers reach for km/h or mph, sailors and pilots for knots, and the coherent unit stays in the lab. Where it does surface publicly is in scientific wind-speed data, in sprint analysis, and generally in anything measured by instrument rather than read off a dashboard.

To put both in perspective: a typical motorway limit is around 120 kilometers per hour, while a brisk walking pace is about 1.4 meters per second.

The converter above updates as you type, and the table lists common values for quick reference. Need the opposite direction? Use the Meters per Second to Kilometers per Hour converter, or browse all Speed converters.