Convert kilowatt-hours to gigajoules
1 kWh = 0.0036 GJ — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.
0.0036GJ
As a fraction: 9/2500
1 kWh = 0.0036 GJ
How to convert kilowatt-hours to gigajoules
Multiply the number of kilowatt-hours by 0.0036 to get gigajoules.
The exact factor is 0.0036 — as a fraction, 9/2500.
Kilowatt-hour: How electricity is billed everywhere.
Kilowatt-hour to Gigajoule conversion table
| Kilowatt-hours (kWh) | Gigajoules (GJ) |
|---|---|
| 1 kWh | 0.0036 |
| 2 kWh | 0.0072 |
| 3 kWh | 0.0108 |
| 5 kWh | 0.018 |
| 10 kWh | 0.036 |
| 20 kWh | 0.072 |
| 25 kWh | 0.09 |
| 50 kWh | 0.18 |
| 100 kWh | 0.36 |
| 250 kWh | 0.9 |
| 500 kWh | 1.8 |
| 1000 kWh | 3.6 |
Gigajoule to Kilowatt-hour conversion table
| Gigajoules (GJ) | Kilowatt-hours (kWh) |
|---|---|
| 1 GJ | 277.777 78 |
| 2 GJ | 555.555 56 |
| 3 GJ | 833.333 33 |
| 5 GJ | 1388.8889 |
| 10 GJ | 2777.7778 |
| 20 GJ | 5555.5556 |
| 25 GJ | 6944.4444 |
| 50 GJ | 13 888.889 |
| 100 GJ | 27 777.778 |
| 250 GJ | 69 444.444 |
| 500 GJ | 138 888.89 |
| 1000 GJ | 277 777.78 |
Frequently asked
How many gigajoules are in a kilowatt-hour?
One kilowatt-hour equals 0.0036 gigajoules (kWh → GJ). That figure is exact, not rounded.
How do you convert kilowatt-hours to gigajoules?
Multiply the number of kilowatt-hours by 0.0036 to get gigajoules.
What is 1 GJ in kilowatt-hours?
One gigajoule is 277.7777778 kilowatt-hours.
What is 10 kWh in GJ?
10 kWh = 0.036 GJ.
What exactly is a kilowatt-hour?
How electricity is billed everywhere.