Our speed converter converts between miles per hour (mph), kilometres per hour (kph), knots, and metres per second (m/s). Speed unit conversions are commonly needed when driving abroad (UK uses mph, most of Europe uses kph), reading weather forecasts (wind speed may be given in knots or mph), or understanding scientific data (metres per second). One mile per hour equals 1.60934 kilometres per hour, and one knot equals 1.852 kilometres per hour. Our converter handles all four units in both directions.