km/h to m/s Converter

🔒 Runs in your browser — nothing is sent to a server

Convert kilometers per hour to meters per second by dividing by 3.6. Useful for converting everyday speed readings into the SI unit needed for physics calculations: kinematic equations, kinetic energy (½mv²), aerodynamic drag and Doppler shift all expect m/s. Anchors: 36 km/h = 10 m/s; 90 km/h = 25 m/s; 108 km/h = 30 m/s. Browser-local.

Kilometer per hour (km/h)
Meter per second (m/s)

Kilometer per hour (km/h) → Meter per second (m/s)

Quick reference table

Kilometer per hour (km/h)Meter per second (m/s)
10 km/h2.7778 m/s
25 km/h6.9444 m/s
50 km/h13.8889 m/s
60 km/h16.6667 m/s
80 km/h22.2222 m/s
100 km/h27.7778 m/s
120 km/h33.3333 m/s
150 km/h41.6667 m/s
200 km/h55.5556 m/s

Glossary

Kilometer per hour (km/h)

A kilometer per hour is the everyday speed unit used on road signs, vehicle speedometers and weather forecasts in nearly every country except the United States and the United Kingdom. 1 km/h = 0.2778 m/s = 0.6214 mph. Highway speed limits are commonly 100–130 km/h; a marathon world record pace is about 21 km/h.

Meter per second (m/s)

The meter per second is the SI derived unit of speed, defined as the distance of one meter travelled in one second. It is the standard unit in physics and engineering. Useful conversions: 1 m/s = 3.6 km/h = 2.2369 mph = 1.9438 knots. Wind speeds, projectile velocities and free-fall figures are typically reported in m/s in scientific contexts.

Metric / SI speed

In the metric system, speed is reported in meters per second (scientific) or kilometers per hour (everyday). The relation is exact: 1 m/s = 3.6 km/h. Most countries use km/h on road signs and speedometers; m/s appears in physics, engineering, weather data and athletics where fine-resolution timing matters.

Imperial / US Customary speed

In the United States, the United Kingdom and a few other countries, road speeds are reported in miles per hour (mph). US engineering also uses feet per second (ft/s). 1 mph = 1.6093 km/h = 0.4470 m/s. Maritime and aviation worldwide use knots (1 knot = 1.852 km/h), independent of the metric/imperial divide.

Related tools

m/s to km/h
Convert m/s to km/h — 1 m/s = 3.6 km/h
km/h to mph
Convert km/h to mph — 1 km/h = 0.6214 mph
mph to m/s
Convert mph to m/s — 1 mph = 0.44704 m/s
Speed Converter
Convert speed — m/s, km/h, mph, knots, ft/s, mach