Convert between miles per hour (mph), kilometers per hour (km/h), meters per second (m/s), feet per second (ft/s), and knots. All conversions happen instantly in your browser.
Enter a speed, choose the unit you have and the unit you want, then tap Convert.
Conversions are based on standard definitions: 1 mph = 1.60934 km/h, 1 m/s = 3.6 km/h, 1 knot = 1.852 km/h, and 1 ft/s ≈ 0.3048 m/s.