How to convert kilowatt-hours to kilojoules
To convert kilowatt-hours to kilojoules, multiply the value by the conversion factor 3,600. To go the other way, multiply by 0.0002777778 (or divide by 3,600).
Worked example: 25 kWh to kJ
- Write the value: 25 kWh
- Multiply by 3,600: 25 × 3,600
- Result: 90,000 kJ
Kilowatt-hour to Kilojoule conversion table
Quick reference values, rounded to 6 significant digits.
| Kilowatt-hour (kWh) | Kilojoule (kJ) |
|---|---|
| 0.001 kWh | 3.6 kJ |
| 0.005 kWh | 18 kJ |
| 0.01 kWh | 36 kJ |
| 0.05 kWh | 180 kJ |
| 0.1 kWh | 360 kJ |
| 0.25 kWh | 900 kJ |
| 0.5 kWh | 1,800 kJ |
| 1 kWh | 3,600 kJ |
| 2 kWh | 7,200 kJ |
| 3 kWh | 10,800 kJ |
| 5 kWh | 18,000 kJ |
| 10 kWh | 36,000 kJ |
| 20 kWh | 72,000 kJ |
| 50 kWh | 180,000 kJ |
| 100 kWh | 360,000 kJ |
Kilojoule to Kilowatt-hour
| kJ | kWh |
|---|---|
| 1 kJ | 0.000277778 kWh |
| 5 kJ | 0.00138889 kWh |
| 10 kJ | 0.00277778 kWh |
| 50 kJ | 0.0138889 kWh |
| 100 kJ | 0.0277778 kWh |
1 Kilowatt-hour in other energy units
About Kilowatt-hour and Kilojoule
What is a kilowatt-hour (kWh)?
A kilowatt-hour (one "unit" on your electricity bill) equals 3.6 million joules.
What is a kilojoule (kJ)?
A kilojoule equals 1,000 joules, used on food labels.
Where kilowatt-hour to kilojoule conversion is used
Energy conversions are needed for electricity bills, food calories, heating, batteries and physics. Converting between kilowatt-hours and kilojoules is especially common when you compare products, read foreign specifications, or fill in forms that expect a specific unit.
Need every unit at once? Use the full Energy Converter.
Frequently asked questions
How many kilojoules are in 1 kilowatt-hour?
1 Kilowatt-hour equals 3,600 kJ.
How do I convert kilowatt-hours to kilojoules?
Multiply the number of kilowatt-hours by 3,600. For example, 25 kWh × 3,600 = 90,000 kJ.
What is 25 kWh in kJ?
25 kWh = 90,000 kJ.
How many kilowatt-hours are in 1 kilojoule?
1 Kilojoule equals 0.000277778 kWh. Use the kJ to kWh converter for the reverse direction.
Is this Kilowatt-hour to Kilojoule converter accurate?
Yes. It uses exact internationally defined conversion factors, calculated with full floating-point precision. Results are displayed rounded for readability.