km/h to m/s Conversion Calculator
Click on the following link if you want to convert meters per second to kilometers per hour – m/s to km/h
History
The kilometer per hour (km/h) has been widely used since the late 19th century when automobiles became common.
The meter per second (m/s), however, is the scientific standard defined in the SI system for all speed measurements.
These two are directly related:
1 km/h = 0.27778 m/s
Common Usage
- km/h is used for car speedometers, road signs, and transportation.
- m/s is used for scientific calculations, meteorology, and engineering.
For example, a car driving 108 km/h is moving at 30 m/s.
Conversion Formula
To convert kilometers per hour to meters per second:
m/s = km/h ÷ 3.6
Example:
Convert 90 km/h to m/s.
90 ÷ 3.6 = 25 m/s
So, 90 km/h equals 25 m/s.
Conversion Table
| Kilometers per Hour (km/h) | Meters per Second (m/s) |
|---|---|
| 10 km/h | 2.78 m/s |
| 20 km/h | 5.56 m/s |
| 30 km/h | 8.33 m/s |
| 40 km/h | 11.11 m/s |
| 50 km/h | 13.89 m/s |
| 60 km/h | 16.67 m/s |
| 80 km/h | 22.22 m/s |
| 100 km/h | 27.78 m/s |
| 120 km/h | 33.33 m/s |
| 150 km/h | 41.67 m/s |
Interesting Facts
- The speed of sound at sea level is about 343 m/s (1,235 km/h).
- A slow jog is roughly 3 m/s (10.8 km/h).
- Converting km/h to m/s helps when calculating reaction time or braking distance in physics.
Frequently Asked Questions
1. How many meters per second are in one kilometer per hour?
0.27778 m/s.
2. How do I convert km/h to m/s?
Divide by 3.6.
3. Which is the official SI unit for speed?
Meter per second (m/s).
4. Why use m/s in physics?
Because it’s directly linked to the SI base units (meter and second).
5. Is 100 km/h a high speed in m/s?
It’s 27.78 m/s, about the speed of a fast car.
