Pound-force foot (lbf·ft)

One pound-force acting at one foot: 4.4482216152605 × 0.3048 N·m. The usual US unit for engine and bolt torque.

What is a pound-force foot?

Symbol: lbf·ft
Quantity: Torque
Unit system: US customary
Definition: One pound-force acting at one foot: 4.4482216152605 × 0.3048 N·m. The usual US unit for engine and bolt torque.
Exact: Yes, the value is exact by definition
Source: NIST Special Publication 811 (2008), Appendix B.8

Used in the US for engine torque, wheel lug nuts and bolt tightening specifications.

Pound-force foot in other units
Pound-force foot	Newton meter	Pound-force inch	Kilonewton meter
1 lbf·ft	= 1.3558179483314004 N·m	= 12 lbf·in	= 0.0013558179483314004 kN·m
10 lbf·ft	= 13.558179483314004 N·m	= 120 lbf·in	= 0.013558179483314004 kN·m
100 lbf·ft	= 135.58179483314004 N·m	= 1200 lbf·in	= 0.13558179483314004 kN·m
1000 lbf·ft	= 1355.8179483314004 N·m	= 12000 lbf·in	= 1.3558179483314004 kN·m

The next smaller torque unit is the newton meter (N·m). 1 lbf·ft = 1.3558179483314004 N·m, and 1 N·m ≈ 0.7375621493 lbf·ft.

The next larger torque unit is the kilogram-force meter (kgf·m). 1 lbf·ft = 0.138254954376 kgf·m, and 1 kgf·m ≈ 7.233013851 lbf·ft.

How many newton meters are in one pound-force foot?: One pound-force foot = 1.3558179483314004 N·m (newton meters).
How many pound-force inches are in one pound-force foot?: One pound-force foot = 12 lbf·in (pound-force inches).
How many kilonewton meters are in one pound-force foot?: One pound-force foot = 0.0013558179483314004 kN·m (kilonewton meters).