Speed Converter
Instantly convert Speed between SI and common engineering units including m/s, km/h, km/s, cm/s. No formula lookup required.
Convert
About
Value × conversion factor to SI base (temperature uses affine offset), then restored to target unit.
Bidirectional conversion with unit swap supported.
How to use
- Enter the value to convert in the Value box.
- Pick the source and target units from the From / To dropdowns.
- Click Convert; the result shows below. Use ⇅ to swap units.
Formula notesUnit conversion (speed): 速度：1 km/h = 0.2778 m/s，1 m/s = 3.6 km/h。