📏 Kilowatt-hours to Kilojoules Converter
Convert kilowatt-hours (kWh) to kilojoules (kJ) instantly, with the formula, a worked example and a conversion table.
Quick answer: 1 kilowatt-hour (kWh) = 3,600 kilojoules (kJ). Formula: kJ = kWh × 3,600.
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Kilowatt-hours to Kilojoules Converter inputs
Result
Kilowatt-hours to Kilojoules conversion table
| Kilowatt-hours (kWh) | Kilojoules (kJ) |
|---|---|
| 0.1 kWh | 360 kJ |
| 0.5 kWh | 1,800 kJ |
| 1 kWh | 3,600 kJ |
| 2 kWh | 7,200 kJ |
| 3 kWh | 10,800 kJ |
| 5 kWh | 18,000 kJ |
| 10 kWh | 36,000 kJ |
| 20 kWh | 72,000 kJ |
| 25 kWh | 90,000 kJ |
| 50 kWh | 180,000 kJ |
| 100 kWh | 360,000 kJ |
| 1,000 kWh | 3,600,000 kJ |
Other energy conversions
How to convert kilowatt-hours to kilojoules
Multiply the number of kilowatt-hours by 3,600 to get kilojoules: kJ = kWh × 3,600.
Example: 5 kWh = 18,000 kJ.
The kilowatt-hour (kWh) and the kilojoule (kJ) are both units of energy. Need the opposite direction? Use the kJ to kWh 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 kilojoules are in a kilowatt-hour?
1 kilowatt-hour = 3,600 kilojoules.
How do I convert kilowatt-hours to kilojoules?
Use the formula kJ = kWh × 3,600. For example, 5 kWh = 18,000 kJ.
How do I convert kilojoules back to kilowatt-hours?
1 kilojoule = 0.0002777778 kilowatt-hours. Use the kJ to kWh 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.