Convert Gigawatt-Hours to Attojoules
Convert Gigawatt-Hours (GWh) to Attojoules (aJ) instantly and accurately.
Conversion Formula
aJ = GWh × 3.600000000e+30
About Gigawatt-Hours
A gigawatt-hour (GWh) is the energy from 1 GW for one hour - exactly 3.6 TJ. National electricity generation is reported in annual GWh: Ireland ~32,000 GWh/year; France ~496,000 GWh/year. The Hornsea One offshore wind farm (1.12 GW) generates ~4,000 GWh/year. The Bath County Pumped Storage (3 GW, USA) stores ~24 GWh. World total battery storage capacity reached ~1,600 GWh by end-2022. Energy of 1 megaton TNT ≈ 1.162 GWh. 1 GWh = 3.6 TJ = 1,000 MWh = 3.412 × 10⁹ BTU.
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
| Gigawatt-Hours (GWh) | Attojoules (aJ) |
|---|---|
| 1 GWh | 3.6 × 1030 aJ |
| 2 GWh | 7.2 × 1030 aJ |
| 5 GWh | 1.8 × 1031 aJ |
| 10 GWh | 3.6 × 1031 aJ |
| 25 GWh | 9 × 1031 aJ |
| 50 GWh | 1.8 × 1032 aJ |
| 100 GWh | 3.6 × 1032 aJ |