🚀 Speed Conversion
Convert speed between metric, imperial, and nautical units like m/s, km/h, mph, and knots.
How speed conversion works
This calculator converts a speed value between the most commonly used units worldwide: meters per second, kilometers per hour, miles per hour, knots, and feet per second. It uses meters per second as a common base, converting your input to it and then to your chosen output unit.
The conversion factors follow international standard definitions: 1 mph = 0.44704 m/s, 1 km/h = 0.2777… m/s, and 1 knot (nautical mile per hour) = 0.514444 m/s. These are the same factors used in aviation, marine navigation, and meteorology.
This tool is provided for general planning and educational purposes, such as converting vehicle, wind, or race speeds between regions that use different unit systems.