1. Convert to base units
m/s = input value x input unit factor
Every supported speed unit is stored as a factor relative to meters per second.
Common unit converter
Velocity Unit Converter
Convert speed and velocity units for engineering, physics, transport, fluids, aerodynamics, navigation, and everyday calculations.
Live velocity conversion
Convert speed and velocity units
Enter a value, choose the starting unit, and select a target unit. The full velocity conversion table updates automatically.
Converted value
All units
Velocity conversion table
Compare the entered value across metric, imperial, navigation, aerodynamic, and scientific speed units.
Common conversions
Useful velocity conversion factors
| Conversion | Factor | Typical use |
|---|---|---|
| Meters per second to km/h | km/h = m/s x 3.6 | Physics, fluids, vehicle speed |
| Kilometers per hour to mph | mph = km/h x 0.621371192 | Road speed conversion |
| Miles per hour to ft/s | ft/s = mph x 1.46666667 | Dynamics and ballistics |
| Knots to km/h | km/h = kn x 1.852 | Marine and aviation navigation |
| Mach to m/s | m/s = Ma x 340.29 | Approximate aerodynamics at sea level |
| Speed of light to m/s | m/s = c x 299,792,458 | Physics and relativity examples |
How it works
Velocity conversion method
2. Convert to target units
target value = base value / target unit factor
The selected result and table values are calculated from the same base value.
3. Check precision
rounding depends on scale
Very small and very large values use compact scientific notation to stay readable.
FAQ
Velocity converter questions
How do you convert meters per second to kilometers per hour?
Multiply meters per second by 3.6 to convert m/s to km/h.
How do you convert kilometers per hour to miles per hour?
Multiply km/h by 0.621371192 to convert kilometers per hour to miles per hour.
Is Mach always 340.29 m/s?
No. Mach depends on the speed of sound, which changes with temperature and medium. This converter uses about 340.29 m/s as a sea-level air reference.
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