Foot per second squared (ft/s²)

The foot per second squared, represented by the symbol ft/s², is an Imperial and United States customary unit of acceleration. It quantifies velocity change in feet over one-second intervals. Since the 1959 International Yard and Pound Agreement defined the international foot as exactly 0.3048 metres, one foot per second squared equals precisely 0.3048 metres per second squared. This unit remains prevalent in American engineering, ballistics, and aviation physics.