About the Speed Converter
What is the Speed Converter?
This speed converter switches between the speed units used on roads, in physics, at sea and in aviation.
It shows the converted speed and the value in every other unit.
How to use the Speed Converter
- Value (sample: 100)
- From (sample: Kilometre per hour (km/h))
- To (sample: Metre per second (m/s))
- Press Convert (results also refresh as you type). The result card shows the Converted Value, along with Result, Conversion factor and Reverse factor.
Formula used
m/s = km/h ÷ 3.6; 1 mph = 0.44704 m/s; 1 knot = 1,852 m per hour
- Mach 1 = 340.29 m/s (sea level, 15 °C)
The speed of sound falls with temperature, so Mach varies with altitude.
Worked example
These are the sample values already filled in the calculator above, and the result it returns for them:
| Input | Sample value |
|---|---|
| Value | 100 |
| From | Kilometre per hour (km/h) |
| To | Metre per second (m/s) |
| Result | Value |
|---|---|
| Converted Value | 27.77778 m/s |
| Result | 100 km/h = 27.7778 m/s |
| Conversion factor | 1 km/h = 0.27777778 m/s |
| Reverse factor | 1 m/s = 3.6 km/h |
Tips for using the Speed Converter
- Divide km/h by 3.6 for m/s – handy in physics problems.
- Multiply mph by 1.609 for km/h.