Speed Converter Convert speed units like mph, km/h, m/s, and knots Speed From Kilometer/hour (km/h) Miles/hour (mph) Meter/second (m/s) Knot (kn) Mach Calculate Kilometer/hour (km/h) - Miles/hour (mph) - Meter/second (m/s) - Knot (kn) - Mach - Related ToolsTime Unit ConverterConvert between milliseconds, seconds, minutes, hours, days, and years