Kilojoules to Kilowatt-hours Converter
Convert kilojoule to kilowatt-hour instantly. Type a value below — the result updates as you type.
When you need to convert kilojoule to kilowatt-hour
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 kJ is about 0.000138889 kWh, and 100 kJ works out to roughly 0.0278 kWh. Because the ratio is fixed at 0.000277778, you can scale any amount linearly — doubling the kilojoules doubles the kilowatt-hours.
Food packaging, power meters and heating equipment each prefer different energy units, so converting makes them directly comparable.
How to convert kilojoule to kilowatt-hour
One kilojoule equals 0.000277778 kilowatt-hours. To convert, multiply the number of kilojoules by 0.000277778:
kilowatt-hours = kilojoules × 0.000277778
For example, 10 kilojoules × 0.000277778 = 0.0028 kilowatt-hours.
Kilojoules to kilowatt-hours conversion table
| Energy (kJ) | Kilowatt-hours (kWh) |
|---|---|
| 1 kJ | 0.000277778 kWh |
| 2 kJ | 0.000555556 kWh |
| 3 kJ | 0.000833333 kWh |
| 5 kJ | 0.0014 kWh |
| 10 kJ | 0.0028 kWh |
| 20 kJ | 0.0056 kWh |
| 50 kJ | 0.0139 kWh |
| 100 kJ | 0.0278 kWh |
FAQ
How many kilowatt-hours are in a kilojoule?
One kilojoule = 0.000277778 kilowatt-hours.
How do I convert kilowatt-hours back to kilojoules?
Divide by 0.000277778, or use the kilowatt-hours to kilojoules converter.