EngiRef / Energy conversion
Convert Joules to Kilowatt-hours (J to kWh)
1 J = 2.77778e-7 kWh. Convert joules to kilowatt-hours with the exact factor, a common-values table and a free converter.
Conversion factor
kWh = J × 2.77778e-7
1 J = 2.77778e-7 kWh
Multiply by 2.77778e-7 kWh to go from joules to kilowatt-hours, or divide by it to come back. The factor and every value below are computed by the same converter that runs at /convert, so this page and the tool cannot disagree.
J to kWh table
| Joules (J) | Kilowatt-hours (kWh) |
|---|---|
| 1 J | 2.77778e-7 kWh |
| 2 J | 5.55556e-7 kWh |
| 5 J | 1.38889e-6 kWh |
| 10 J | 2.77778e-6 kWh |
| 20 J | 5.55556e-6 kWh |
| 50 J | 1.38889e-5 kWh |
| 100 J | 2.77778e-5 kWh |
Every figure is computed at build time by the site’s own converter from the energy unit registry. For a value that is not listed, put it into the interactive converter.
Frequently asked questions
How many kilowatt-hours are in one Joule?
One Joule is 2.77778e-7 kWh, so 100 J is 2.77778e-5 kWh.
What is the formula to convert joules to kilowatt-hours?
kWh = J × 2.77778e-7. Multiply the value in joules by 2.77778e-7 to get kilowatt-hours.
How do I convert kilowatt-hours back to joules?
J = kWh × 3600000, so 1 kWh is 3600000 J. The kWh to J page carries the same table in that direction.