How to convert kilojoules to kilowatt hours
To convert kilojoules to kilowatt hours, multiply by 0.000277777777778. Energy conversions connect nutrition, electricity bills, heating systems and physics.
Kilojoule to Kilowatt-hour conversion table
| Kilojoule (kJ) | Kilowatt-hour (kWh) |
|---|---|
| 0.1 kJ | 0.0000277777777778 kWh |
| 0.5 kJ | 0.000138888888889 kWh |
| 1 kJ | 0.000277777777778 kWh |
| 2 kJ | 0.000555555555556 kWh |
| 3 kJ | 0.000833333333333 kWh |
| 4 kJ | 0.00111111111111 kWh |
| 5 kJ | 0.00138888888889 kWh |
| 10 kJ | 0.00277777777778 kWh |
| 20 kJ | 0.00555555555556 kWh |
| 25 kJ | 0.00694444444444 kWh |
| 50 kJ | 0.0138888888889 kWh |
| 100 kJ | 0.0277777777778 kWh |
| 500 kJ | 0.138888888889 kWh |
| 1,000 kJ | 0.277777777778 kWh |
About the units
Kilojoule (kJ)
A kilojoule is 1,000 joules and appears on food labels in many countries.
Kilowatt-hour (kWh)
A kilowatt-hour equals 3.6 million joules and is the unit on electricity bills.
How to use this converter
- Type the number of kilojoules (kJ) in the input box.
- The result in kilowatt hours appears instantly — no button needed.
- See the same value in every other energy unit just below.
- Use “Swap units” to convert kilowatt hours back to kilojoules.
Tips for better results
- Double-check which system a unit belongs to (for example US vs UK gallons).
- Use the swap button to convert in the opposite direction instantly.
- Bookmark the conversions you use most — each pair has its own page.
Frequently asked questions
How many kilowatt hours are in one kilojoule?
One kilojoule equals 0.000277777777778 kilowatt hours. 0.000277777777778 is the exact factor used by this converter.
How do I convert kilojoules to kilowatt hours?
Multiply the value in kilojoules by 0.000277777777778. To go the other way, multiply kilowatt hours by 3,600.
What is 10 kJ in kWh?
10 kJ = 0.00277777777778 kWh. Also, 5 kJ = 0.00138888888889 kWh and 100 kJ = 0.0277777777778 kWh.
What is the difference between a kilojoule and a kilowatt-hour?
A kilojoule is 1,000 joules and appears on food labels in many countries. A kilowatt-hour equals 3.6 million joules and is the unit on electricity bills.
Is this tool free and private?
Yes — the Kilojoule to Kilowatt-hour is completely free with no sign-up, and it runs entirely in your browser, so the values you enter are never uploaded to our servers.
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