lb-ft
Units & Measurements abbreviation · Engineering Unit
| Stands for | Pound-feet |
|---|---|
| Categories | Units & Measurements |
lb-ft stands for Pound-feet, an engineering unit abbreviation.
US unit of torque: one pound of force applied at a distance of one foot. American car reviews and spec sheets give engine torque in lb-ft, such as 400 lb-ft for a performance V8.
Example: The turbo diesel produces 1,050 lb-ft of torque at 1,600 rpm.
Usage notes
Many engineers reserve lb-ft for torque and ft-lb for work or energy, though the two are numerically equal and used interchangeably, especially on torque wrenches. One lb-ft equals about 1.356 N·m. Horsepower can be calculated as lb-ft × rpm ÷ 5,252.