ft lb definition
Foot-pound (energy) Not to be confused with Pound-foot (torque) or Foot-poundal. The foot-pound force (symbol: ftÂ·lbf) is a unit of work or energy in the Engineering and Gravitational Systems in United States customary and imperial units of measure. It is the energy transferred upon applying a force of one pound-force (lbf) through a linear displacement of one foot. The corresponding SI unit is the joule.