Watt-hours to Kilojoules Converter
Convert Wh to kJ instantly. 1 Wh = 3.6 kJ.
Conversion Formula
kJ = Wh × 3.6
Example
25 Wh × 3.6 = 90 kJ
Convert the other way: Kilojoules to Watt-hours →
Watt-hours to Kilojoules Conversion Table
| Watt-hours (Wh) | Kilojoules (kJ) |
|---|---|
| 0.1 | 0.36 |
| 0.5 | 1.8 |
| 1 | 3.6 |
| 2 | 7.2 |
| 5 | 18 |
| 10 | 36 |
| 20 | 72 |
| 25 | 90 |
| 50 | 180 |
| 100 | 360 |
| 500 | 1,800 |
| 1,000 | 3,600 |
About These Units
- Watt-hours (Wh)
- Exactly 3,600 joules, the energy delivered by one watt for one hour. Watt-hours rate phone power banks and laptop batteries, and airlines set their lithium battery carry-on limits in this unit.
- Kilojoules (kJ)
- Exactly 1,000 joules. Kilojoules appear on food labels in Australia, New Zealand, and the European Union alongside or instead of calories, and one food Calorie equals about 4.184 kJ.
Frequently Asked Questions
How many kJ are in 1 Wh?
1 Wh equals 3.6 kJ.
How do I convert Watt-hours to Kilojoules?
Multiply your Watt-hours value by 3.6. For example, 25 Wh × 3.6 = 90 kJ.
How many Wh are in 1 kJ?
1 kJ equals 0.2777777778 Wh.