Convert kilojoule (kJ) to watt hour (Wh).
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Watt Hour to Kilojoule Converter (Wh to kJ)
Convert watt hour (Wh) to kilojoule (kJ).Unit Converter · Energy
Quick answer
1 watt hour (Wh) is equal to 3.6 kilojoules (kJ). 1 kilojoule (kJ) is approximately equal to 0.2777778 watt hours (Wh).
To convert Wh to kJ, multiply the value in watt hours by 3.6. For example, 10 Wh = 36 kJ, and 100 Wh = 360 kJ.
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Quick reference — watt hour to kilojoule
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How to convert watt hours to kilojoules
How many kilojoules are in a watt hour? 1 watt hour is 3.6 kilojoules. This free Wh to kJ converter and watt hour to kilojoule calculator gives the answer instantly for any value.
To convert watt hour (Wh) to kilojoule (kJ), multiply the value in watt hours by 3.6.
kJ = Wh × 3.6
- 1
Take the value in watt hours
For example, 25 Wh.
- 2
Multiply by 3.6
25 × 3.6.
- 3
Read the answer in kilojoules
25 Wh = 90 kJ.
Watt Hour to Kilojoule conversion table
Common values from 1 to 1,000 watt hours converted to kilojoules.
| Watt Hour (Wh) | Kilojoule (kJ) |
|---|---|
| 1 Wh | 3.6 kJ |
| 2 Wh | 7.2 kJ |
| 3 Wh | 10.8 kJ |
| 4 Wh | 14.4 kJ |
| 5 Wh | 18 kJ |
| 6 Wh | 21.6 kJ |
| 7 Wh | 25.2 kJ |
| 8 Wh | 28.8 kJ |
| 9 Wh | 32.4 kJ |
| 10 Wh | 36 kJ |
| 15 Wh | 54 kJ |
| 20 Wh | 72 kJ |
| 25 Wh | 90 kJ |
| Watt Hour (Wh) | Kilojoule (kJ) |
|---|---|
| 30 Wh | 108 kJ |
| 40 Wh | 144 kJ |
| 50 Wh | 180 kJ |
| 60 Wh | 216 kJ |
| 70 Wh | 252 kJ |
| 75 Wh | 270 kJ |
| 80 Wh | 288 kJ |
| 90 Wh | 324 kJ |
| 100 Wh | 360 kJ |
| 250 Wh | 900 kJ |
| 500 Wh | 1,800 kJ |
| 1,000 Wh | 3,600 kJ |
About watt hours and kilojoules
Watt Hour (Wh)
A watt-hour (Wh) is the energy of one watt used for one hour, equal to 3,600 joules. Battery capacities are often given in Wh.
Kilojoule (kJ)
A kilojoule (kJ) is 1,000 joules. Food energy on nutrition labels is often shown in kJ as well as kcal.
Wh to kJ: common questions
- How many kilojoules are in 1 watt hour?
- 1 watt hour (Wh) is equal to 3.6 kilojoules (kJ). In short: 1 Wh = 3.6 kJ.
- How do I convert watt hours to kilojoules?
- To convert Wh to kJ, multiply the value in watt hours by 3.6. For example, 5 Wh = 18 kJ.
- How do I convert kilojoules to watt hours?
- To convert kJ to Wh, divide the value in kilojoules by 3.6. Or open the Kilojoule to Watt Hour converter, which does it for you.
- What is 10 Wh in kJ, and what is 100 Wh?
- 10 Wh = 36 kJ, and 100 Wh = 360 kJ. The table above lists more values from 1 to 1,000.
- Is this Wh to kJ converter accurate?
- Yes. It uses the exact conversion factor and shows results to as many as 8 decimal places, so you can rely on it for study, work and everyday measuring.
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