Meters per Second to km/h Converter
1 m/s = 3.6 km/h
Whether you are working in transportation or athletics, converting from meters per second to kilometers per hour is a task you will encounter regularly. Meters per second is the SI derived unit of speed, combining the base units of length (meter) and time (second). For quick reference, 1 m/s equals 3.6 km/h.
Conversion formula
km/h = m/s x 3.6
To convert m/s to km/h, multiply by 3.6. There are 3,600 seconds in an hour and 1,000 meters in a kilometer, so 3,600/1,000 = 3.6.
Meters per Second to Kilometers per Hour Table
| Meters per Second (m/s) | Kilometers per Hour (km/h) |
|---|---|
| 1 | 3.6 |
| 2 | 7.2 |
| 5 | 18 |
| 10 | 36 |
| 15 | 54 |
| 20 | 72 |
| 30 | 108 |
| 50 | 180 |
| 100 | 360 |
| 343 | 1,234.8 |
About Meters per Second to Kilometers per Hour
The meters-per-second to km/h conversion bridges scientific measurements with everyday speed. m/s is the SI unit used in physics and meteorology, while km/h is what speedometers and road signs display.
In physics, the speed of sound at sea level is approximately 343 m/s (1,234.8 km/h or 767 mph). The speed of light is 299,792,458 m/s (about 1.08 billion km/h). A bullet from a rifle travels at about 900 m/s (3,240 km/h).
Wind speeds in meteorological data are often reported in m/s. The Beaufort scale defines a gale as 17.2-20.7 m/s (62-75 km/h) and a hurricane as above 33 m/s (119 km/h). Storm chasers know that 50 m/s (180 km/h) winds can destroy buildings.
In sports science, sprinting speed is measured in m/s. Usain Bolt's peak speed was 12.27 m/s (44.17 km/h) during his 100m world record. An average jogger runs at about 2.5-3 m/s (9-11 km/h). A professional cyclist cruises at 11-14 m/s (40-50 km/h).
The conversion factor of 3.6 is one of the cleanest in physics. Simply multiplying m/s by 3.6 gives km/h. To go back, divide km/h by 3.6. For example, a car at 90 km/h is moving at exactly 25 m/s.
Frequently Asked Questions
How do you convert m/s to km/h?
Multiply by 3.6. For example, 10 m/s x 3.6 = 36 km/h. This works because there are 3,600 seconds per hour and 1,000 meters per km.
What is 1 m/s in km/h?
1 m/s equals exactly 3.6 km/h. This is about walking pace for a slow stroll.
What is the speed of sound in km/h?
The speed of sound at sea level (20 C) is approximately 343 m/s = 1,234.8 km/h = 767 mph. It varies with temperature and altitude.
Why do scientists use m/s instead of km/h?
m/s is the SI (International System) unit for speed. It integrates cleanly with other SI units in physics equations. Force (Newtons), energy (Joules), and acceleration (m/s2) all use meters and seconds.