Motion & Frequency
Speed Converter
Speed is distance per unit time, based on metres per second. km/h dominates road use, the knot in navigation, and Mach for supersonic flight.
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About this category: Speed
Speed is distance per unit time, based on metres per second. km/h dominates road use, the knot in navigation, and Mach for supersonic flight.
Speed is distance per time; 1 knot = 1.852 km/h and Mach β 340.29 m/s at sea level.
Practical uses
- Vehicle and road speeds
- Marine and air navigation
- Aerodynamics and mechanics
Available units
| Unit | Name | Definition | Classification |
|---|---|---|---|
| m/s | Meter per Second | The SI base unit of speed. | SI Derived |
| km/h | Kilometer per Hour | The common road-vehicle speed unit. | Non-SI |
| mph | Mile per Hour | The imperial/US speed unit. | Non-SI |
| kn | Knot | One nautical mile per hour. | Non-SI |
| ft/s | Foot per Second | An imperial speed unit common in engineering. | Non-SI |
| Mach | Mach | The speed of sound at sea level (340.29 m/s). | Non-SI |
| c | Speed of Light | The speed of light in vacuum = 299,792,458 m/s. | SI Derived |
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