kWh to joules
Convert electrical energy into joules. One kilowatt-hour is 3.6 million joules.
Edit either value. Use a decimal point; commas group thousands. Rounding affects display only.
How to convert kilowatt-hours to joules
Convert electrical energy into joules. One kilowatt-hour is 3.6 million joules.
Formula coefficients shown rounded. Calculations use the stored factors before display rounding.
A worked example
For 10 kWh, the result is approximately 36000000 J. To go the other way, edit the result above or swap the units.
A kilowatt-hour measures energy, not power. Calories here are thermochemical; a food Calorie is one kilocalorie.
Where the numbers come from
Factors follow NIST conversion references and documented unit definitions. Read our accuracy and rounding notes.
The table and method describe this page’s original pair. Changing units above does not change this reference section.
| Kilowatt-hours (kWh) | Joules (J) |
|---|---|
| 1 | 3600000 |
| 2 | 7200000 |
| 5 | 18000000 |
| 10 | 36000000 |
| 20 | 72000000 |
| 25 | 90000000 |
| 50 | 180000000 |
| 100 | 360000000 |
| 500 | 1800000000 |
| 1000 | 3600000000 |