Convert kilowatt-hours to kilojoules
1 kWh = 3600 kJ — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.
3600kJ
1 kWh = 3600 kJ
How to convert kilowatt-hours to kilojoules
Multiply the number of kilowatt-hours by 3600 to get kilojoules.
The exact factor is 3600 .
Kilowatt-hour: How electricity is billed everywhere.
Kilowatt-hour to Kilojoule conversion table
| Kilowatt-hours (kWh) | Kilojoules (kJ) |
|---|---|
| 1 kWh | 3600 |
| 2 kWh | 7200 |
| 3 kWh | 10 800 |
| 5 kWh | 18 000 |
| 10 kWh | 36 000 |
| 20 kWh | 72 000 |
| 25 kWh | 90 000 |
| 50 kWh | 180 000 |
| 100 kWh | 360 000 |
| 250 kWh | 900 000 |
| 500 kWh | 1 800 000 |
| 1000 kWh | 3 600 000 |
Kilojoule to Kilowatt-hour conversion table
| Kilojoules (kJ) | Kilowatt-hours (kWh) |
|---|---|
| 1 kJ | 0.000 277 777 78 |
| 2 kJ | 0.000 555 555 56 |
| 3 kJ | 0.000 833 333 33 |
| 5 kJ | 0.001 388 888 9 |
| 10 kJ | 0.002 777 777 8 |
| 20 kJ | 0.005 555 555 6 |
| 25 kJ | 0.006 944 444 4 |
| 50 kJ | 0.013 888 889 |
| 100 kJ | 0.027 777 778 |
| 250 kJ | 0.069 444 444 |
| 500 kJ | 0.138 888 89 |
| 1000 kJ | 0.277 777 78 |
Frequently asked
How many kilojoules are in a kilowatt-hour?
One kilowatt-hour equals 3600 kilojoules (kWh → kJ). That figure is exact, not rounded.
How do you convert kilowatt-hours to kilojoules?
Multiply the number of kilowatt-hours by 3600 to get kilojoules.
What is 1 kJ in kilowatt-hours?
One kilojoule is 0.0002777777778 kilowatt-hours.
What is 10 kWh in kJ?
10 kWh = 36 000 kJ.
What exactly is a kilowatt-hour?
How electricity is billed everywhere.