Speed Converter

Convert between 6 speed units.

Unit Symbol
meters per second m/s
kilometers per hour km/h
miles per hour mph
knots kn
feet per second ft/s
mach Ma

Speed conversion is essential for travelers, pilots, sailors, and engineers. The world is divided on speed: the US and UK use miles per hour (mph) for roads, while the rest of the world uses kilometers per hour (km/h). In the air and at sea, 'knots' are the universal language. Scientists prefer meters per second (m/s). Whether you're driving in a foreign country, tracking a hurricane, or studying physics, our speed converter bridges the gap. Key numbers: 60 mph ≈ 96.5 km/h, and 1 knot ≈ 1.15 mph.