Centimeter per second cm/s Meter per second m/s Kilometer per second km/s Kilometer per hour km/h Meter per hour m/h Centimeter per hour cm/h Millimeter per second mm/s Foot per second ft/s Yard per second yd/s Mile per hour mi/h Mile per second mi/s Knot kn Speed of light c Speed of sound v_sound CodeArt Units Converter by www.codeisart.net