The value in
Système International (SI) units is given by multiplying the following exact factors: :One
pound (mass) = :
Standard gravity = 9.80665 m/s2 Despite this, in practice torque units are commonly called the foot-pound (denoted as either lb-ft or ft-lb) or the inch-pound (denoted as in-lb). Practitioners depend on context and the hyphenated abbreviations to know that these refer to neither energy nor moment of mass (as the symbol ft-lb rather than lbf-ft would imply). Similarly, an
inch-pound (or
pound-inch) is the torque of one pound of force applied to one inch of distance from the pivot, and is equal to . It is commonly used on
torque wrenches and
torque screwdrivers for setting specific fastener tension. An
inch-ounce is a smaller unit, equal to of an inch-pound. ==See also==