Pound-force

Physical unit
Unit name	Pound-force
Unit symbol	${\displaystyle \mathrm {lb,lbf,lb_{f},lb_{F},lb_{\mathit {F}}} }$
Physical quantity (s)	force
Formula symbol	${\displaystyle F}$
dimension	${\displaystyle {\mathsf {M\;L\;T^{-2}}}}$
system	Anglo-American system of measurement
In SI units	${\displaystyle \mathrm {1\,lb_{f}=4{,}448\,221\,615\,260\,5\;N} }$
Derived from	Pound

Pound-force (Engl. Colloquially pound translates force pounds ) is an Anglo-American unit for forces and with lb, lbf or lb _f abbreviated. One pound-force corresponds to the force that is exerted on a mass of one English Avoirdupois pound (0.45359237 kg) due to the acceleration of gravity on the earth's surface. Usually the standard acceleration rate g _n  = 9.80665 m / s² is used, but sometimes rounded to 32.17405 ft / s² or the like. It follows that a pound-force corresponds to about 4.4482 N.

For pipes and tire pressures according to the US American standard, the compressive strength is specified in psi or lbs , which means pounds per square inch , more precisely pound-force per square inch .

1000 times this unit is sometimes referred to in the USA as kip (from kilo-pound). The unit is mainly used by architects and civil engineers.

Individual evidence

1. ↑ What is a kip? on sizes.com, accessed May 26, 2018