How to convert kilojoules to kilowatt-hours
To convert kilojoules to kilowatt-hours, multiply the value by the conversion factor 0.0002777778. To go the other way, multiply by 3,600 (or divide by 0.0002777778).
Worked example: 25 kJ to kWh
- Write the value: 25 kJ
- Multiply by 0.0002777778: 25 × 0.0002777778
- Result: 0.00694444 kWh
Kilojoule to Kilowatt-hour conversion table
Quick reference values, rounded to 6 significant digits.
| Kilojoule (kJ) | Kilowatt-hour (kWh) |
|---|---|
| 0.1 kJ | 0.0000277778 kWh |
| 0.25 kJ | 0.0000694444 kWh |
| 0.5 kJ | 0.000138889 kWh |
| 1 kJ | 0.000277778 kWh |
| 2 kJ | 0.000555556 kWh |
| 3 kJ | 0.000833333 kWh |
| 4 kJ | 0.00111111 kWh |
| 5 kJ | 0.00138889 kWh |
| 6 kJ | 0.00166667 kWh |
| 7 kJ | 0.00194444 kWh |
| 8 kJ | 0.00222222 kWh |
| 9 kJ | 0.0025 kWh |
| 10 kJ | 0.00277778 kWh |
| 12 kJ | 0.00333333 kWh |
| 15 kJ | 0.00416667 kWh |
| 20 kJ | 0.00555556 kWh |
| 25 kJ | 0.00694444 kWh |
| 30 kJ | 0.00833333 kWh |
| 40 kJ | 0.0111111 kWh |
| 50 kJ | 0.0138889 kWh |
| 75 kJ | 0.0208333 kWh |
| 100 kJ | 0.0277778 kWh |
| 250 kJ | 0.0694444 kWh |
| 500 kJ | 0.138889 kWh |
| 1,000 kJ | 0.277778 kWh |
Kilowatt-hour to Kilojoule
| kWh | 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 |
1 Kilojoule in other energy units
About Kilojoule and Kilowatt-hour
What is a kilojoule (kJ)?
A kilojoule equals 1,000 joules, used on food labels.
What is a kilowatt-hour (kWh)?
A kilowatt-hour (one "unit" on your electricity bill) equals 3.6 million joules.
Where kilojoule to kilowatt-hour conversion is used
Energy conversions are needed for electricity bills, food calories, heating, batteries and physics. Converting between kilojoules and kilowatt-hours 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 kilowatt-hours are in 1 kilojoule?
1 Kilojoule equals 0.000277778 kWh.
How do I convert kilojoules to kilowatt-hours?
Multiply the number of kilojoules by 0.0002777778. For example, 25 kJ × 0.0002777778 = 0.00694444 kWh.
What is 25 kJ in kWh?
25 kJ = 0.00694444 kWh.
How many kilojoules are in 1 kilowatt-hour?
1 Kilowatt-hour equals 3,600 kJ. Use the kWh to kJ converter for the reverse direction.
Is this Kilojoule to Kilowatt-hour converter accurate?
Yes. It uses exact internationally defined conversion factors, calculated with full floating-point precision. Results are displayed rounded for readability.