Convert Kilojoules to Kilowatt-hours
kJ to kWh · energy conversion
What are kilojoules and kilowatt-hours?
A kilojoule is 1,000 joules, used for food energy outside the US. A kilowatt-hour is 1,000 watt-hours, the unit electric utilities bill by. For reference: a food Calorie is one kilocalorie (4,184 J), and home electricity is billed in kilowatt-hours.
How to convert kilojoules to kilowatt-hours
1 kJ = 0.000277778 kWh. To convert, multiply the number of kilojoules by 0.000277778. For example, 5 kJ = 0.00138889 kWh, and 20 kJ = 0.00555556 kWh. To go the other way, multiply kilowatt-hours by 3,600 (since 1 kWh = 3,600 kJ).
Kilojoules to Kilowatt-hours conversion table
| Kilojoules (kJ) | Kilowatt-hours (kWh) |
|---|---|
| 1 | 0.000277778 |
| 10 | 0.00277778 |
| 100 | 0.0277778 |
| 500 | 0.138889 |
| 1,000 | 0.277778 |
| 2,000 | 0.555556 |
| 5,000 | 1.38889 |
FAQ
What is 1 kJ in kWh?
1 kJ = 0.000277778 kWh. To convert any amount, multiply the number of kilojoules by 0.000277778.
How do I convert kilowatt-hours back to kilojoules?
Go the other way: 1 kWh = 3,600 kJ, so multiply kilowatt-hours by 3,600 to get kilojoules.
Is a kilojoule bigger than a kilowatt-hour?
No — 1 kJ is the smaller unit, equal to 0.000277778 kWh (it takes 3,600 kJ to make one kWh).
Are these energy conversions exact?
They use the standard internationally-defined conversion factors. Results are rounded to six significant figures for readability, which is accurate enough for everyday and most technical use.