Watt-hours to Kilojoules
Convert watt-hours to kilojoules (Wh to kJ). 1 Wh = 3.6 kJ. Use the calculator, formula and conversion table.
How to convert watt-hours to kilojoules
Multiply the amount in watt-hours by 3.6 to get kilojoules. The displayed factor and results are rounded to 12 significant digits.
kJ = Wh × 3.6Worked example
1 Wh = 3.6 kJ. 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.
Watt-hours to Kilojoules table
| Watt-hours (Wh) | Kilojoules (kJ) |
|---|---|
| 0 | 0 |
| 1 | 3.6 |
| 5 | 18 |
| 10 | 36 |
| 25 | 90 |
| 100 | 360 |
| 1,000 | 3,600 |
About this conversion
What is the formula for watt-hours to kilojoules?
kJ = Wh × 3.6. Multiply the amount in watt-hours by 3.6 to get kilojoules. The displayed factor and results are rounded to 12 significant digits.
How do I convert back to watt-hours?
Use the kilojoules to watt-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.