📏 Kilojoules to Kilowatt-hours Converter
Convert kilojoules (kJ) to kilowatt-hours (kWh) instantly, with the formula, a worked example and a conversion table.
Quick answer: 1 kilojoule (kJ) = 0.0002777778 kilowatt-hours (kWh). Formula: kWh = kJ × 0.0002777778.
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Kilojoules to Kilowatt-hours Converter inputs
Result
Kilojoules to Kilowatt-hours conversion table
| Kilojoules (kJ) | Kilowatt-hours (kWh) |
|---|---|
| 0.1 kJ | 0.0000277778 kWh |
| 0.5 kJ | 0.0001388889 kWh |
| 1 kJ | 0.0002777778 kWh |
| 2 kJ | 0.0005555556 kWh |
| 3 kJ | 0.0008333333 kWh |
| 5 kJ | 0.0013888889 kWh |
| 10 kJ | 0.0027777778 kWh |
| 20 kJ | 0.0055555556 kWh |
| 25 kJ | 0.0069444444 kWh |
| 50 kJ | 0.013888889 kWh |
| 100 kJ | 0.027777778 kWh |
| 1,000 kJ | 0.27777778 kWh |
Other energy conversions
How to convert kilojoules to kilowatt-hours
Multiply the number of kilojoules by 0.0002777778 to get kilowatt-hours: kWh = kJ × 0.0002777778.
Example: 5 kJ = 0.0013888889 kWh.
The kilojoule (kJ) and the kilowatt-hour (kWh) are both units of energy. Need the opposite direction? Use the kWh to kJ converter.
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Metric and imperial units
The metric system (SI) is used by almost every country and by science worldwide. Its units scale by powers of ten – 1 kilometer is 1,000 meters, 1 meter is 100 centimeters – which makes conversions inside the system easy. The imperial and US customary systems (inches, feet, pounds, gallons) are still used daily in the United States and partly in the UK.
Since 1959 the inch has been defined as exactly 2.54 centimeters and the pound as exactly 0.45359237 kilograms, so conversions between the two systems are exact. Note that a US gallon (3.785 L) and an imperial gallon (4.546 L) are different – choose the right one above.
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Frequently asked questions
How many kilowatt-hours are in a kilojoule?
1 kilojoule = 0.0002777778 kilowatt-hours.
How do I convert kilojoules to kilowatt-hours?
Use the formula kWh = kJ × 0.0002777778. For example, 5 kJ = 0.0013888889 kWh.
How do I convert kilowatt-hours back to kilojoules?
1 kilowatt-hour = 3,600 kilojoules. Use the kWh to kJ converter linked on this page.
Are these conversions exact?
Yes – all factors use the internationally defined values (for example 1 inch = 2.54 cm exactly, 1 pound = 0.45359237 kg exactly). Results are rounded to 8 significant digits for display.