Convert Kilojoules to Megawatt-Hours
Convert Kilojoules (kJ) to Megawatt-Hours (MWh) instantly and accurately.
Conversion Formula
MWh = kJ × 2.777777778e-7
About Kilojoules
A kilojoule (kJ) is exactly 1,000 J and is the standard energy unit for food and physical chemistry. EU, Australian, and NZ food labels are mandatory in kJ: recommended adult intake is ~8,400 kJ/day. Bond dissociation energies: C-H bond 413 kJ/mol; C=C double bond 614 kJ/mol; N≡N triple bond 945 kJ/mol. Specific heat of water: 4.184 kJ/(kg·K). A cyclist riding at 150 W for one hour expends 540 kJ. Charpy and Izod impact toughness tests record results in J and kJ. 1 kJ = 1,000 J = 239.0 cal = 0.94782 BTU = 0.27778 Wh.
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
| Kilojoules (kJ) | Megawatt-Hours (MWh) |
|---|---|
| 1 kJ | 2.778 × 10-7 MWh |
| 2 kJ | 5.556 × 10-7 MWh |
| 5 kJ | 1.389 × 10-6 MWh |
| 10 kJ | 2.778 × 10-6 MWh |
| 25 kJ | 6.944 × 10-6 MWh |
| 50 kJ | 1.389 × 10-5 MWh |
| 100 kJ | 2.778 × 10-5 MWh |