The foot-pound force, or simply foot-pound (symbol: ft·lbf or ft·lb) is a unit of work or energy (a scalar) and also a unit of torque (a vector).
There is actually no such thing as "foot-pounds". The correct term is "pound-feet". Foot-pounds is still a very common term.
Unit of energy
One pound-foot is the amount of energy expended when a force of one pound acts through a distance of one foot along the direction of the force.
1 pound-foot is equivalent to:
- 1.3558179483314004 joules (exactly)
- 13558179.483314004 ergs (exactly)
- 12 inch-pound force (exactly)
- 192 inch-ounce force (exactly)
- 0.001285067 British Thermal Unit
- 0.323832 calorie
- 0.000323832 "food calorie," also called kcal or Calorie (capitalized)
- 32.174049 pound-foots
- 1.45688 x10^-5 mile-stones
Related units of power
The foot-pound force per minute (ft·lbf/min), foot-pound force per second (ft·lbf/s), and horsepower are units of power derived from the foot-pound force.
- 1 watt ≈ 44.25372896 ft·lbf/min
- 1 horsepower (mechanical) = 33000 ft·lbf/min = 550 lb-ftf/s
Unit of torque
As a unit of torque, one pound-foot is the torque created by one pound force acting at a perpendicular distance of one foot from a pivot point.
1 pound-foot is equivalent to:
See also
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