Foot-pound-force (ft·lbf)

Work of one pound-force acting through one foot: 4.4482216152605 N × 0.3048 m.

What is a foot-pound-force?

Symbol: ft·lbf
Quantity: Energy
Unit system: US customary
Definition: Work of one pound-force acting through one foot: 4.4482216152605 N × 0.3048 m.
Exact: Yes, the value is exact by definition
Source: NIST Special Publication 811 (2008), Appendix B.8

Used in US engineering for work and energy, for example the muzzle energy of a bullet.

Foot-pound-force in other units
Foot-pound-force	Joule	Kilojoule	Kilocalorie (thermochemical)
1 ft·lbf	= 1.3558179483314004 J	= 0.0013558179483314004 kJ	≈ 0.0003240482668 kcal
10 ft·lbf	= 13.558179483314004 J	= 0.013558179483314004 kJ	≈ 0.003240482668 kcal
100 ft·lbf	= 135.58179483314004 J	= 0.13558179483314004 kJ	≈ 0.03240482668 kcal
1000 ft·lbf	= 1355.8179483314004 J	= 1.3558179483314004 kJ	≈ 0.3240482668 kcal

The next smaller energy unit is the joule (J). 1 ft·lbf = 1.3558179483314004 J, and 1 J ≈ 0.7375621493 ft·lbf.

The next larger energy unit is the calorie (cal). 1 ft·lbf ≈ 0.3240482668 cal, and 1 cal ≈ 3.085960033 ft·lbf.

How many joules are in one foot-pound-force?: One foot-pound-force = 1.3558179483314004 J (joules).
How many kilojoules are in one foot-pound-force?: One foot-pound-force = 0.0013558179483314004 kJ (kilojoules).
How many kilocalories are in one foot-pound-force?: One foot-pound-force ≈ 0.0003240482668 kcal (kilocalories).