Pound-foot (lbf·ft)
The pound-foot (lbf·ft, often written ft-lb on torque wrenches) is the torque of one pound-force at one foot, about 1.356 N·m.
Symbol: lbf·ft (ASCII: lbf-ft)
Quantity: torque (moment of force)
SI relation: 1 lbf·ft = 1.355817948331 N·m (exact)
Derivation: 1 lbf·ft = 4.4482216152605 N × 0.3048 m = 1.3558179483314 N·m
Exact: yes, by definition
Typical uses
- US car wheel-lug and bolt torques
- Engine torque in US specifications
- Torque wrench scales
Convert pound-feet to other units
| Conversion | 1 lbf·ft equals | Reverse |
|---|---|---|
| pound-foot to newton-meter | 1.355817948 N·m | newton-meter to pound-foot |
| pound-foot to pound-inch | 12 lbf·in | pound-inch to pound-foot |
| pound-foot to kilogram-force centimeter | 13.82549544 kgf·cm | kilogram-force centimeter to pound-foot |
| pound-foot to kilonewton-meter | 0.001355817948 kN·m | kilonewton-meter to pound-foot |
| pound-foot to newton-centimeter | 135.5817948 N·cm | newton-centimeter to pound-foot |
| pound-foot to ounce-inch | 192 ozf·in | ounce-inch to pound-foot |
| pound-foot to kilogram-force meter | 0.1382549544 kgf·m | kilogram-force meter to pound-foot |
| pound-foot to dyne-centimeter | 13558179.48 dyn·cm | dyne-centimeter to pound-foot |
Open the Torque Converter to convert any value between all units.
Sources
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "pound-force foot (lbf·ft)".
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Pound-foot (lbf·ft). Retrieved October 17, 2026, from https://scientificconverters.com/units/pound-force-foot/
IEEE
Scientific Converters, "Pound-foot (lbf·ft)," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/units/pound-force-foot/