Convert watt hour (Wh) to kilojoule (kJ).
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Kilojoule to Watt Hour Converter (kJ to Wh)
Convert kilojoule (kJ) to watt hour (Wh).Unit Converter · Energy
Quick answer
1 kilojoule (kJ) is approximately equal to 0.2777778 watt hours (Wh). 1 watt hour (Wh) is equal to 3.6 kilojoules (kJ).
To convert kJ to Wh, multiply the value in kilojoules by 0.2777777778 (or divide by 3.6). For example, 10 kJ = 2.77777778 Wh, and 100 kJ = 27.77777778 Wh.
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Quick reference — kilojoule to watt hour
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How to convert kilojoules to watt hours
How many watt hours are in a kilojoule? 1 kilojoule is about 0.2777778 watt hours. This free kJ to Wh converter and kilojoule to watt hour calculator gives the answer instantly for any value.
To convert kilojoule (kJ) to watt hour (Wh), multiply the value in kilojoules by 0.2777777778, or divide it by 3.6.
Wh = kJ × 0.2777777778
- 1
Take the value in kilojoules
For example, 25 kJ.
- 2
Multiply by 0.2777777778
25 × 0.2777777778.
- 3
Read the answer in watt hours
25 kJ = 6.94444444 Wh.
Kilojoule to Watt Hour conversion table
Common values from 1 to 1,000 kilojoules converted to watt hours.
| Kilojoule (kJ) | Watt Hour (Wh) |
|---|---|
| 1 kJ | 0.27777778 Wh |
| 2 kJ | 0.55555556 Wh |
| 3 kJ | 0.83333333 Wh |
| 4 kJ | 1.11111111 Wh |
| 5 kJ | 1.38888889 Wh |
| 6 kJ | 1.66666667 Wh |
| 7 kJ | 1.94444444 Wh |
| 8 kJ | 2.22222222 Wh |
| 9 kJ | 2.5 Wh |
| 10 kJ | 2.77777778 Wh |
| 15 kJ | 4.16666667 Wh |
| 20 kJ | 5.55555556 Wh |
| 25 kJ | 6.94444444 Wh |
| Kilojoule (kJ) | Watt Hour (Wh) |
|---|---|
| 30 kJ | 8.33333333 Wh |
| 40 kJ | 11.11111111 Wh |
| 50 kJ | 13.88888889 Wh |
| 60 kJ | 16.66666667 Wh |
| 70 kJ | 19.44444444 Wh |
| 75 kJ | 20.83333333 Wh |
| 80 kJ | 22.22222222 Wh |
| 90 kJ | 25 Wh |
| 100 kJ | 27.77777778 Wh |
| 250 kJ | 69.44444444 Wh |
| 500 kJ | 138.88888889 Wh |
| 1,000 kJ | 277.77777778 Wh |
About kilojoules and watt hours
Kilojoule (kJ)
A kilojoule (kJ) is 1,000 joules. Food energy on nutrition labels is often shown in kJ as well as kcal.
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.
kJ to Wh: common questions
- How many watt hours are in 1 kilojoule?
- 1 kilojoule (kJ) is approximately equal to 0.2777778 watt hours (Wh). In short: 1 kJ ≈ 0.2777778 Wh.
- How do I convert kilojoules to watt hours?
- To convert kJ to Wh, multiply the value in kilojoules by 0.2777777778 (or divide by 3.6). For example, 5 kJ = 1.38888889 Wh.
- How do I convert watt hours to kilojoules?
- To convert Wh to kJ, multiply the value in watt hours by 3.6. Or open the Watt Hour to Kilojoule converter, which does it for you.
- What is 10 kJ in Wh, and what is 100 kJ?
- 10 kJ = 2.77777778 Wh, and 100 kJ = 27.77777778 Wh. The table above lists more values from 1 to 1,000.
- Is this kJ to Wh 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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