Foot-pound


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Physical unit
Unit name foot-pound
Unit symbol
Physical quantity (s) energy
Formula symbol
dimension
system Anglo-American system of measurement
In SI units
In CGS units
Derived from Foot , pound
Physical unit
Unit name Pound-foot
Unit symbol
Physical quantity (s) Torque
Formula symbol
dimension
system Anglo-American system of measurement
In SI units
In CGS units
Derived from Foot , pound

The foot-pound or foot-pound force is a British and American unit of both energy and torque (there also pound-foot ). The unit symbol is ft lb or ft lbf , also lbf ft .

One foot-pound is exactly 1.355 817 948 331 400 4  J ( Joule ) and corresponds to the energy that has to be applied to lift a body with a mass of one pound by one foot against its weight :

550 foot-pounds per second correspond to one hp (about 745.7 watts).