Convert Foot-Pound-Force to Ergs
Convert Foot-Pound-Force (ft·lbf) to Ergs (erg) instantly and accurately.
Conversion Formula
erg = ft·lbf × 13558179.48
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 Ergs
An erg is the CGS unit of energy - the work done by one dyne through one centimetre - exactly 10⁻⁷ J. Despite SI adoption, the erg persists in astrophysics: the Sun's luminosity is 3.828 × 10³³ erg/s; gamma-ray burst isotropic energies are quoted in units of 10⁵¹ erg ('one foe'). Surface tension of water is 72.8 dyn/cm; the work to create 1 cm² of new water-air interface is 72.8 erg. Earthquake seismic moment M₀ is in dyn·cm = erg; the 2004 Boxing Day earthquake had M₀ ≈ 10²³ J = 10³⁰ erg. 1 erg = 10⁻⁷ J = 624.15 eV.
Quick Reference Table
| Foot-Pound-Force (ft·lbf) | Ergs (erg) |
|---|---|
| 1 ft·lbf | 13558200 erg |
| 2 ft·lbf | 27116400 erg |
| 5 ft·lbf | 67790900 erg |
| 10 ft·lbf | 135582000 erg |
| 25 ft·lbf | 338954000 erg |
| 50 ft·lbf | 677909000 erg |
| 100 ft·lbf | 1.356 × 109 erg |