Speed Converter
Convert mph, km/h, m/s, knots and other speed units.
About Speed Units
Speed is defined as distance per time. The SI unit is meters per second (m/s). Other common units include km/h (road), mph (USA/UK road), and knots (nautical/aviation). Mach number depends on medium and temperature; Mach 1 at sea level is approximately 340.29 m/s.