Kilowatt-hours to kilojoules converter
Kilojoules (kJ)
1 kilowatt-hour = 3,600 kilojoules
How to convert kilowatt-hours to kilojoules
kJ = kWh × 3600
Multiply the number of kilowatt-hours by 3600 to get kilojoules. Going the other way, divide by 3600 (or multiply by 0.000277777777778).
One kilowatt-hour is exactly defined as 3600 kilojoules (to 12 significant figures), and one kilojoule is 0.000277777777778 kilowatt-hours.
Worked examples
- Convert 5 kilowatt-hours: 5 × 3600 = 18,000 18,000 kilojoules.
- Convert 12.5 kilowatt-hours: 12.5 × 3600 = 45,000 45,000 kilojoules.
- Convert 250 kilowatt-hours: 250 × 3600 = 900,000 900,000 kilojoules.
Quick-reference table
| kWh | kJ |
|---|---|
| 1 | 3,600 |
| 2 | 7,200 |
| 3 | 10,800 |
| 5 | 18,000 |
| 10 | 36,000 |
| 15 | 54,000 |
| 20 | 72,000 |
| 25 | 90,000 |
| 50 | 180,000 |
| 75 | 270,000 |
| 100 | 360,000 |
| 1,000 | 3,600,000 |
| kJ | kWh |
|---|---|
| 1 | 0.0002777777778 |
| 2 | 0.0005555555556 |
| 3 | 0.0008333333333 |
| 5 | 0.001388888889 |
| 10 | 0.002777777778 |
| 15 | 0.004166666667 |
| 20 | 0.005555555556 |
| 25 | 0.006944444444 |
| 50 | 0.01388888889 |
| 75 | 0.02083333333 |
| 100 | 0.02777777778 |
| 1,000 | 0.2777777778 |
Related conversions
Frequently asked questions
How many kilojoules are in 1 kilowatt-hour?
1 kilowatt-hour equals 3,600 kilojoules.
What is the formula to convert kilowatt-hours to kilojoules?
Use kJ = kWh × 3600. Multiply the number of kilowatt-hours by 3600 to get kilojoules. Going the other way, divide by 3600 (or multiply by 0.000277777777778).
What is 100 kilowatt-hours in kilojoules?
100 kilowatt-hours is 360,000 kilojoules.