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Foot-pound force
From Wikipedia, the free encyclopedia
The foot-pound force, or simply foot-pound (symbol: ft·lbf or ft·lb) is unit of work or energy and also a unit of torque.
1 foot-pound is equivalent to:
- 12 inch-pound force (in·lbf or sometimes informally written: ″#)
- 192 inch-ounce force (in·ozf)
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As a unit of energy, one foot-pound is energy expended when one pound-force acts through a distance of one foot along the direction of the force.
1 foot-pound is equivalent to:
- 1.3558179483314004 joules (exactly)
- 13558179.483314004 ergs (exactly)
- ~0.001285067 British Thermal Unit IT
- ~0.323832 calorie IT (calIT)
- ~0.000323832 "food calorie" (kcal or Cal)
- ~32.174049 foot-poundals (ft pdl)
The foot-pound force per minute (ft·lbf/min) and foot-pound force per second (ft·lbf/s) are units of power derived from the foot-pound force. The English horsepower is defined in terms of it.
- 1 watt ≈ 44.25372896 ft·lbf/min
- 1 horsepower (mechanical) = 33000 ft·lbf/min = 550 ft·lbf/s
As a unit of torque, one foot-pound is the torque created by one pound force acting at a perpendicular distance of one foot from a pivot point. The term pound-foot is sometimes used to distinguish the unit of torque from the unit of energy. Pound-foot is used by engine manufacturers in specifying the torque output of an engine.
1 foot-pound is equivalent to:
- 1.3558179483314004 newton meter (exactly)