Kilojoules to Kilowatt-hours (kJ to kWh) Converter
1 kilojoule equals 0.00027778 kilowatt-hours — multiply the number of kilojoules by 0.00027778 to convert to kilowatt-hours. Since 1 kWh is 3600 kJ, the conversion factor is simply 1 divided by 3600.
The formula
To convert kilojoules to kilowatt-hours, multiply by 0.00027778:
kilowatt-hours = kilojoules × 0.00027778
For example, 3600 kJ × 0.00027778 = 1 kWh. The reverse factor is 1 kWh = 3600 kJ.
Conversion table
| Kilojoules (kJ) | Kilowatt-hours (kWh) |
|---|---|
| 1 | 0.00027778 |
| 2 | 0.00055556 |
| 5 | 0.00138889 |
| 10 | 0.00277778 |
| 25 | 0.00694444 |
| 50 | 0.01388889 |
| 100 | 0.02777778 |
| 500 | 0.13888889 |
| 1000 | 0.27777778 |
How to convert online
- Type the number of kilojoules into the first box.
- Read the equivalent kilowatt-hours instantly in the second box.
- Or enter a kilowatt-hour value to convert back to kilojoules — it works both ways.
Use the Kilojoule to Kilowatt-hour Converter — free and instant in your browser.
Where this conversion is used
Kilowatt-hours are how electricity bills, battery capacities and appliance energy use are measured, while scientific and engineering data often arrives in kilojoules. Converting kJ to kWh lets you translate a physics or datasheet energy figure into the unit your utility meter and energy costs actually use.
FAQ
How many kilowatt-hours are in a kilojoule?
0.00027778 kWh. So 1000 kJ = 0.27777778 kWh, and 3600 kJ = 1 kWh.
What is the formula to convert kilojoules to kilowatt-hours?
kWh = kJ × 0.00027778, which is the same as dividing kilojoules by 3600.
How do I convert kilowatt-hours back to kilojoules?
Multiply by 3600. For example, 2 kWh = 7200 kJ.
Is the conversion exact?
The exact factor is 1/3600 ≈ 0.000277778; the tool uses this to high precision.
Related converters
- Kilowatt-hour to Kilojoule Converter
- Kilojoule to Watt-hour Converter
- Kilojoule to Joule Converter
- Kilojoule to Kilocalorie Converter
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