Convert Attojoules to Exajoules
Convert Attojoules (aJ) to Exajoules (EJ) instantly and accurately.
Conversion Formula
EJ = aJ × 1.000000000e-36
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.
About Exajoules
An exajoule (EJ) is 10¹⁸ J - the scale of global energy consumption. World primary energy supply in 2022 was ~580-610 EJ: coal ~160 EJ; oil ~190 EJ; gas ~145 EJ; nuclear ~26 EJ; wind ~8 EJ; solar PV ~8 EJ. Global electricity generation of ~29,000 TWh = 104 EJ. Solar energy incident on Earth's atmosphere is ~5.5 × 10⁶ EJ/year - approximately 9,000× total human demand. Annual fossil fuel combustion releases ~490 EJ/year, producing ~36.8 Gt CO₂. 1 EJ = 10¹⁸ J = 277.78 TWh = 238.85 Mtoe.
Quick Reference Table
| Attojoules (aJ) | Exajoules (EJ) |
|---|---|
| 1 aJ | 1 × 10-36 EJ |
| 2 aJ | 2 × 10-36 EJ |
| 5 aJ | 5 × 10-36 EJ |
| 10 aJ | 1 × 10-35 EJ |
| 25 aJ | 2.5 × 10-35 EJ |
| 50 aJ | 5 × 10-35 EJ |
| 100 aJ | 1 × 10-34 EJ |