Online Speed Unit Converter
m/s / km/h / mph / knot
1 km/h = 0.2777777778 m/s Click to copy
Common Conversions
About Speed Unit Conversion
The speed converter suits traffic, nautical, sports and engineering speed estimates, converting among km/h, m/s, mph and knot. You can also use the Time Unit Converter to estimate speed with distance and time.
Common Formulas
- 1 m/s = 3.6 km/h
- 1 mph = 1.609344 km/h
- 1 knot = 1.852 km/h
- 100 km/h ≈ 27.7778 m/s
Use Cases
- Vehicle, sports and nautical speed conversions, engineering estimates
- Speed conversions between km/h, m/s, mph and knot
Tips
- Mach number depends on temperature and medium; this tool uses the approximate speed of sound in standard atmosphere.
FAQ
How many m/s is 100 km/h?
100 km/h ≈ 27.7777778 m/s.
Does the converter support knots?
Yes. 1 knot ≈ 1.852 km/h, commonly used for maritime and aviation speeds.
What is Mach and how to convert it?
Mach (Ma) is the ratio of flight speed to the local speed of sound: 1 Mach ≈ 340.3 m/s ≈ 1225 km/h (at room temperature and pressure). Mach is not fixed but depends on altitude and temperature; this tool gives approximate conversions under the standard atmosphere.