Convert Foot-Pound-Force to Attojoules
Convert Foot-Pound-Force (ft·lbf) to Attojoules (aJ) instantly and accurately.
Conversion Formula
aJ = ft·lbf × 1.355817948e+18
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 Attojoules
An attojoule (aJ) is 10⁻¹⁸ J - the scale of individual X-ray photons and superconducting qubit circuits. A 1 keV X-ray photon carries 160 aJ; a visible green photon (~550 nm) carries ~0.36 aJ. Josephson junction energies in superconducting qubits are set in tens to hundreds of aJ to achieve quantum coherence at millikelvin temperatures. XRISM's cryogenic TES X-ray spectrometer resolves individual photon energies at the hundreds-of-aJ level with ~7 eV FWHM resolution. 1 aJ = 10⁻¹⁸ J = 6.242 eV.
Quick Reference Table
| Foot-Pound-Force (ft·lbf) | Attojoules (aJ) |
|---|---|
| 1 ft·lbf | 1.356 × 1018 aJ |
| 2 ft·lbf | 2.712 × 1018 aJ |
| 5 ft·lbf | 6.779 × 1018 aJ |
| 10 ft·lbf | 1.356 × 1019 aJ |
| 25 ft·lbf | 3.39 × 1019 aJ |
| 50 ft·lbf | 6.779 × 1019 aJ |
| 100 ft·lbf | 1.356 × 1020 aJ |