Convert Foot-Pound-Force to Gigajoules
Convert Foot-Pound-Force (ft·lbf) to Gigajoules (GJ) instantly and accurately.
Conversion Formula
GJ = ft·lbf × 1.355817948e-9
About Foot-Pound-Force
A foot-pound-force (ft·lbf) is the work done by one pound-force through one foot - exactly 1.3558179483314004 J. It is the standard torque and energy unit in US engineering. Automotive engine torque: Honda Civic ~125 lb-ft; Ford F-150 EcoBoost ~500 lb-ft. Muzzle energies: .22 LR ~140 ft·lbf; .308 Winchester ~2,600 ft·lbf; .50 BMG ~14,000 ft·lbf. Diesel pile hammers deliver 15,000-600,000 ft·lbf/blow. SAE Grade 8 bolts are specified at 7-950 ft·lbf. 1 ft·lbf = 12 in·lbf = 1.35582 J = 0.32405 cal.
About Gigajoules
A gigajoule (GJ) is 10⁹ J - the scale of fossil-fuel commodity volumes. One barrel of crude oil contains ~5.80 GJ; one metric tonne of hard coal ~29.3 GJ. Canadian energy bills express household consumption in GJ: average Canadian households use ~100-130 GJ/year. A 1 GW power plant at 33% efficiency burns ~10.9 GJ/h of fuel to generate 1 GWh = 3.6 GJ of electricity. Detonation of 1 tonne of TNT releases 4.184 GJ. 1 GJ = 10⁹ J = 277.78 kWh = 947,817 BTU = 9.4782 therms.
Quick Reference Table
| Foot-Pound-Force (ft·lbf) | Gigajoules (GJ) |
|---|---|
| 1 ft·lbf | 1.356 × 10-9 GJ |
| 2 ft·lbf | 2.712 × 10-9 GJ |
| 5 ft·lbf | 6.779 × 10-9 GJ |
| 10 ft·lbf | 1.356 × 10-8 GJ |
| 25 ft·lbf | 3.39 × 10-8 GJ |
| 50 ft·lbf | 6.779 × 10-8 GJ |
| 100 ft·lbf | 1.356 × 10-7 GJ |