Convert Inch-Pound-Force to Attojoules
Convert Inch-Pound-Force (in·lbf) to Attojoules (aJ) instantly and accurately.
Conversion Formula
aJ = in·lbf × 1.129848290e+17
About Inch-Pound-Force
An inch-pound-force (in·lbf) is the work done by one pound-force through one inch - exactly 0.11298482902761670 J (= 1/12 ft·lbf). It is the dominant torque unit for small fasteners and precision instruments in the US: a #6-32 screw in aluminium is torqued to 4-6 in·lbf; a dental implant abutment screw to ~25-30 Ncm (2.2-2.7 in·lbf). Hobby servo motor torque is quoted in oz·in (1 in·lbf = 16 oz·in). Bicycle stem bolts are typically 4-6 Nm (35-53 in·lbf). 1 in·lbf = 0.11298 J = 1/12 ft·lbf = 11.298 Ncm.
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
| Inch-Pound-Force (in·lbf) | Attojoules (aJ) |
|---|---|
| 1 in·lbf | 1.13 × 1017 aJ |
| 2 in·lbf | 2.26 × 1017 aJ |
| 5 in·lbf | 5.649 × 1017 aJ |
| 10 in·lbf | 1.13 × 1018 aJ |
| 25 in·lbf | 2.825 × 1018 aJ |
| 50 in·lbf | 5.649 × 1018 aJ |
| 100 in·lbf | 1.13 × 1019 aJ |