Speed
Kilometers per hour, meters per second, miles per hour, knots and Mach
Kilometers per Hour to Meters per Second
Convert kilometers per hour to meters per second for physics, engineering, vehicle speed, sports, and formula checks.
Meters per Second to Kilometers per Hour
Convert meters per second to kilometers per hour for physics, engineering, vehicle speed, sports, and formula checks.
Kilometers per Hour to Miles per Hour
Convert kilometers per hour to miles per hour for speed limits, driving, road signs, vehicle dashboards, and travel planning.
Miles per Hour to Kilometers per Hour
Convert miles per hour to kilometers per hour for speed limits, driving, road signs, vehicle dashboards, and travel planning.
Knots to Kilometers per Hour
Convert knots to kilometers per hour for maritime speed, aviation, shipping, weather, and nautical-mile checks.
Kilometers per Hour to Knots
Convert kilometers per hour to knots for maritime speed, aviation, shipping, weather, and nautical-mile checks.
Mach to Kilometers per Hour
Convert Mach number to kilometers per hour using the common Mach 1 approximation for dry air near sea level at 20 °C.
Kilometers per Hour to Mach
Convert kilometers per hour to Mach number using the common speed-of-sound approximation for dry air near sea level at 20 °C.
Speed of Light to Kilometers per Second
Convert the speed of light in vacuum to kilometers per second for physics, astronomy, relativity, and scientific notation checks.
Kilometers per Second to Speed of Light
Convert kilometers per second to a fraction of the speed of light in vacuum for physics, astronomy, and relativity checks.