Speed ConverterBy AiToolsWeb / September 21, 2026 From: Miles per hour (mph) Kilometers per hour (km/h) Meters per second (m/s) Knot (kn) Foot per second (ft/s) = To: Miles per hour (mph) Kilometers per hour (km/h) Meters per second (m/s) Knot (kn) Foot per second (ft/s)