Convert Attojoules to Megawatt-Hours
Convert Attojoules (aJ) to Megawatt-Hours (MWh) instantly and accurately.
Conversion Formula
MWh = aJ × 2.777777778e-28
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 Megawatt-Hours
A megawatt-hour (MWh) is the energy from 1 MW for one hour - exactly 3.6 GJ. It is the standard unit for wholesale electricity trading. Power purchase agreements (PPAs) specify capacity and price in $/MWh or €/MWh. A 5 MW wind turbine at full capacity generates 5 MWh/h. Primary aluminium smelting consumes 13-15 MWh per tonne. The Moss Landing battery (California) stores 3,287 MWh. The daily output of a 1 GW nuclear plant at 90% capacity factor is ~21,600 MWh. 1 MWh = 3.6 GJ = 3,412,141 BTU = 1,000 kWh.
Quick Reference Table
| Attojoules (aJ) | Megawatt-Hours (MWh) |
|---|---|
| 1 aJ | 2.778 × 10-28 MWh |
| 2 aJ | 5.556 × 10-28 MWh |
| 5 aJ | 1.389 × 10-27 MWh |
| 10 aJ | 2.778 × 10-27 MWh |
| 25 aJ | 6.944 × 10-27 MWh |
| 50 aJ | 1.389 × 10-26 MWh |
| 100 aJ | 2.778 × 10-26 MWh |