Joules to Kilowatt-hours
Convert joules to kilowatt-hours (J to kWh). 1 J = 2.77777777778E-7 kWh. Use the calculator, formula and conversion table.
How to convert joules to kilowatt-hours
Multiply the amount in joules by 2.77777777778E-7 to get kilowatt-hours. The displayed factor and results are rounded to 12 significant digits.
kWh = J × 2.77777777778E-7Worked example
1 J = 2.77777777778E-7 kWh. Change the amount in the calculator above to use your own value.
Units and assumptions
A watt-hour is 3,600 joules. Calories use the thermochemical definition (4.184 J); BTU uses the International Table definition.
Calculator results use floating-point arithmetic and are rounded for display. The reference table below uses up to 12 significant digits.
Joules to Kilowatt-hours table
| Joules (J) | Kilowatt-hours (kWh) |
|---|---|
| 0 | 0 |
| 1 | 2.77777777778E-7 |
| 5 | 0.00000138888888889 |
| 10 | 0.00000277777777778 |
| 25 | 0.00000694444444444 |
| 100 | 0.0000277777777778 |
| 1,000 | 0.000277777777778 |
About this conversion
What is the formula for joules to kilowatt-hours?
kWh = J × 2.77777777778E-7. Multiply the amount in joules by 2.77777777778E-7 to get kilowatt-hours. The displayed factor and results are rounded to 12 significant digits.
How do I convert back to joules?
Use the kilowatt-hours to joules calculator to reverse this conversion. You can also use Swap units in the calculator above.
Can I use a different pair of units?
Choose another unit in the calculator, or open the energy converter to browse all supported pairs.