Kilojoules to Kilowatt-hours
Type a value in kJ and get kWh instantly: 1 kJ = 0.000278 kWh
1 kJ = 0.000278 kWh
⇄ Kilowatt-hour → KilojouleThe conversion between kilojoules (kJ) and kilowatt-hours (kWh) is fixed: 1 kJ = 0.000278 kWh and 1 kWh = 3,600 kJ. To convert kJ to kWh, multiply by 0.000278; to go the other way, multiply by 3,600 (or divide by 0.000278). For example, 1,000 kJ = 0.2778 kWh and 3,600 kJ = 1 kWh.
Enter any value in the converter above; the result updates as you type. You will also find a ready-made table for common values, the formula, and a link to the reverse conversion (kilowatt-hours to kilojoules).
1 kWh is the energy of 1 kW used for one hour: 1,000 W × 3,600 s = 3,600,000 J = 3,600 kJ = 3.6 MJ. Electricity bills use kWh; food labels and physics use kJ. A 2,000 W kettle running for 3 minutes uses 0.1 kWh = 360 kJ.
Quick answers
Kilojoules to Kilowatt-hours conversion table
| Kilojoules (kJ) | Kilowatt-hours (kWh) |
|---|---|
| 1 kJ | 0.000278 kWh |
| 10 kJ | 0.00278 kWh |
| 100 kJ | 0.0278 kWh |
| 360 kJ | 0.1 kWh |
| 1,000 kJ | 0.2778 kWh |
| 3,600 kJ | 1 kWh |
| 10,000 kJ | 2.7778 kWh |
| 36,000 kJ | 10 kWh |
| 100,000 kJ | 27.778 kWh |
| 1,000,000 kJ | 277.78 kWh |
Kilowatt-hours to Kilojoules quick table
| Kilowatt-hours (kWh) | Kilojoules (kJ) |
|---|---|
| 0.001 kWh | 3.6 kJ |
| 0.01 kWh | 36 kJ |
| 0.5 kWh | 1,800 kJ |
| 1 kWh | 3,600 kJ |
| 5 kWh | 18,000 kJ |
| 10 kWh | 36,000 kJ |
| 50 kWh | 180,000 kJ |
| 100 kWh | 360,000 kJ |
| 500 kWh | 1,800,000 kJ |
| 1,000 kWh | 3,600,000 kJ |
Frequently Asked Questions
How many kilowatt-hours are in 1 Kilojoule?
1 kJ = 0.000278 kWh. Multiply a value in kJ by 0.000278 to get kWh.
How do I convert kilowatt-hours to kilojoules?
Multiply the value in kWh by 3,600, or divide it by 0.000278. For example, 0.2778 kWh ≈ 1,000 kJ.
What is 3,600 kJ in kWh?
3,600 kJ = 1 kWh.
Is the factor 0.000278 exact?
Both units have exact international definitions, so the factor is fixed; only the displayed value is rounded.