Kilowatt-hours to Kilojoules Converter
Convert kilowatt-hour to kilojoule instantly. Type a value below — the result updates as you type.
When you need to convert kilowatt-hour to kilojoule
Energy conversions appear on nutrition labels, utility bills and appliance specs, letting you compare food energy, electricity use and heating output on a common scale.
Typical values: 0.5 kWh is about 1800 kJ, and 5 kWh works out to roughly 18000 kJ. Because the ratio is fixed at 3600, you can scale any amount linearly — doubling the kilowatt-hours doubles the kilojoules.
Food packaging, power meters and heating equipment each prefer different energy units, so converting makes them directly comparable.
How to convert kilowatt-hour to kilojoule
One kilowatt-hour equals 3600 kilojoules. To convert, multiply the number of kilowatt-hours by 3600:
kilojoules = kilowatt-hours × 3600
For example, 10 kilowatt-hours × 3600 = 36000 kilojoules.
Kilowatt-hours to kilojoules conversion table
| Energy (kWh) | Kilojoules (kJ) |
|---|---|
| 1 kWh | 3600 kJ |
| 2 kWh | 7200 kJ |
| 3 kWh | 10800 kJ |
| 5 kWh | 18000 kJ |
| 10 kWh | 36000 kJ |
| 20 kWh | 72000 kJ |
| 50 kWh | 180000 kJ |
| 100 kWh | 360000 kJ |
FAQ
How many kilojoules are in a kilowatt-hour?
One kilowatt-hour = 3600 kilojoules.
How do I convert kilojoules back to kilowatt-hours?
Divide by 3600, or use the kilojoules to kilowatt-hours converter.