Foot-pound force

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The foot-pound force, or simply foot-pound (symbol: ft·lb_f 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·lb_f or sometimes informally written: ″#)
• 192 inch-ounce force (in·oz_f)

Contents 1 Unit of energy 1.1 Related units of power 2 Unit of torque 3 See also

[edit] Unit of energy

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 (cal_IT)
• ~0.000323832 "food calorie" (kcal or Cal)
• ~32.174049 foot-poundals (ft pdl)

[edit] Related units of power

The foot-pound force per minute (ft·lb_f/min) and foot-pound force per second (ft·lb_f/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·lb_f/min
• 1 horsepower (mechanical) = 33000 ft·lb_f/min = 550 ft·lb_f/s

[edit] Unit of torque

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)

[edit] See also

• Poundal
• Slug (mass)
• Units of energy
• Conversion of unitsde:Foot-pound

fr:Pied-livre ja:フィート重量ポンド fi:Naulajalka