Speed Converter
Use this speed converter to accurately convert between different units of speed including meters per second, kilometers per hour, miles per hour, knots, and more. Enter a value, select your units, and get instant conversion results.
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About Speed Units
Meter per Second (m/s) - The SI unit of speed. Defined as one meter of distance traveled in one second.
Kilometer per Hour (km/h) - Commonly used for vehicle speeds in most countries. Equal to 0.2778 meters per second.
Mile per Hour (mph) - The standard measure of vehicle speed in the United States and the United Kingdom. Equal to 0.4470 meters per second.
Foot per Second (ft/s) - Used in engineering in the United States. Equal to 0.3048 meters per second.
Knot (kn) - Used for maritime and air navigation. One knot equals one nautical mile per hour, or approximately 0.5144 meters per second.
Mach - The speed of an object relative to the speed of sound in the surrounding medium. Mach 1 at sea level is approximately 343 meters per second.
Speed of Light (c) - The universal speed limit. Equal to 299,792,458 meters per second in vacuum.
Kilometer per Second (km/s) - Often used in astronomy. Equal to 1000 meters per second.
Mile per Second (mi/s) - Used occasionally in astronomy. Equal to 1609.344 meters per second.
Foot per Minute (ft/min) - Used in some engineering applications. Equal to 0.00508 meters per second.
Yard per Minute (yd/min) - Equal to 0.01524 meters per second.
| Unit | m/s | km/h | mph | knots |
|---|---|---|---|---|
| 1 m/s | 1 | 3.6 | 2.237 | 1.944 |
| 1 km/h | 0.2778 | 1 | 0.6214 | 0.5399 |
| 1 mph | 0.4470 | 1.609 | 1 | 0.8689 |
| 1 knot | 0.5144 | 1.852 | 1.151 | 1 |
| 1 ft/s | 0.3048 | 1.097 | 0.6818 | 0.5925 |
| Mach 1 | 343 | 1235 | 767 | 666 |