Speed Converter
Convert km/h, mph, m/s, ft/s, knots, and Mach in both directions. Everything happens on your device - nothing is ever uploaded.
Runs entirely on your device - nothing is ever uploaded.
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How to use the speed converter
- Type a value in the From field and choose its speed unit.
- The converted value appears instantly - swap units or edit either side.
- Conversions run in both directions as you type.
What it is for
Road trips abroad, aviation and sailing, running and cycling pace, physics homework, and spec sheets - anywhere two speed units meet.
How it works
Each unit carries its exact internationally defined factor to meters per second; Mach is referenced to the standard speed of sound at sea level, 340.29 m/s. Results are computed on your device instantly as you type.