Convert Megawatt-Hours to Exajoules
Convert Megawatt-Hours (MWh) to Exajoules (EJ) instantly and accurately.
Conversion Formula
EJ = MWh × 3.600000000e-9
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.
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
| Megawatt-Hours (MWh) | Exajoules (EJ) |
|---|---|
| 1 MWh | 3.6 × 10-9 EJ |
| 2 MWh | 7.2 × 10-9 EJ |
| 5 MWh | 1.8 × 10-8 EJ |
| 10 MWh | 3.6 × 10-8 EJ |
| 25 MWh | 9 × 10-8 EJ |
| 50 MWh | 1.8 × 10-7 EJ |
| 100 MWh | 3.6 × 10-7 EJ |