How to convert joules to kilowatt-hours
kWh = J × 0.0000002778
One joule equals 0.0000002778 kWh, so multiply the value in joules by 0.0000002778. Example: 10 J = 0.0000027778 kWh.
The calorie here is the thermochemical calorie (exactly 4.184 J); a food "Calorie" is one kilocalorie. One kilowatt-hour is exactly 3.6 MJ. The BTU is the International Table BTU (1,055.05585262 J).
Joules to kilowatt-hours conversion table
| Joules (J) | Kilowatt-hours (kWh) |
|---|---|
| 1 J | 0.0000002778 kWh |
| 2 J | 0.0000005556 kWh |
| 3 J | 0.0000008333 kWh |
| 5 J | 0.0000013889 kWh |
| 10 J | 0.0000027778 kWh |
| 15 J | 0.0000041667 kWh |
| 20 J | 0.0000055556 kWh |
| 25 J | 0.0000069444 kWh |
| 50 J | 0.0000138889 kWh |
| 75 J | 0.0000208333 kWh |
| 100 J | 0.0000277778 kWh |
| 250 J | 0.0000694444 kWh |
| 500 J | 0.0001388889 kWh |
| 1,000 J | 0.0002777778 kWh |