Joules to Kilowatt-hours Converter
Convert joule to kilowatt-hour instantly. Type a value below — the result updates as you type.
When you need to convert joule 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 J is about 1.38889e-07 kWh, and 100 J works out to roughly 2.77778e-05 kWh. Because the ratio is fixed at 2.77778e-07, you can scale any amount linearly — doubling the joules 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 joule to kilowatt-hour
One joule equals 2.77778e-07 kilowatt-hours. To convert, multiply the number of joules by 2.77778e-07:
kilowatt-hours = joules × 2.77778e-07
For example, 10 joules × 2.77778e-07 = 2.77778e-06 kilowatt-hours.
Joules to kilowatt-hours conversion table
| Energy (J) | Kilowatt-hours (kWh) |
|---|---|
| 1 J | 2.77778e-07 kWh |
| 2 J | 5.55556e-07 kWh |
| 3 J | 8.33333e-07 kWh |
| 5 J | 1.38889e-06 kWh |
| 10 J | 2.77778e-06 kWh |
| 20 J | 5.55556e-06 kWh |
| 50 J | 1.38889e-05 kWh |
| 100 J | 2.77778e-05 kWh |
FAQ
How many kilowatt-hours are in a joule?
One joule = 2.77778e-07 kilowatt-hours.
How do I convert kilowatt-hours back to joules?
Divide by 2.77778e-07, or use the kilowatt-hours to joules converter.