Kilowatt-hours to Joules
Convert kilowatt-hours to joules (kWh to J). 1 kWh = 3,600,000 J. Use the calculator, formula and conversion table.
How to convert kilowatt-hours to joules
Multiply the amount in kilowatt-hours by 3,600,000 to get joules. The displayed factor and results are rounded to 12 significant digits.
J = kWh × 3,600,000Worked example
1 kWh = 3,600,000 J. 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.
Kilowatt-hours to Joules table
| Kilowatt-hours (kWh) | Joules (J) |
|---|---|
| 0 | 0 |
| 1 | 3,600,000 |
| 5 | 18,000,000 |
| 10 | 36,000,000 |
| 25 | 90,000,000 |
| 100 | 360,000,000 |
| 1,000 | 3,600,000,000 |
About this conversion
What is the formula for kilowatt-hours to joules?
J = kWh × 3,600,000. Multiply the amount in kilowatt-hours by 3,600,000 to get joules. The displayed factor and results are rounded to 12 significant digits.
How do I convert back to kilowatt-hours?
Use the joules to kilowatt-hours 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.