ENERGY CONVERSION
Watt-hour to Kilojoule.
Convert watt-hour (Wh) to kilojoule (kJ), with the math explained.
THE MATH, MADE SIMPLE
How to convert watt-hour to kilojoule
Multiply your watt-hour value by 3.6 to get the equivalent in kilojoule. Both units are normalized through the joule.
kJ = Wh × 3.610 Wh = 36 kJ
Result rounded to 12 significant digits. Change the precision in the calculator to suit your task.QUICK REFERENCE
Wh to kJ conversion table
| Watt-hour (Wh) | Kilojoule (kJ) |
|---|---|
| 1 Wh | 3.6 kJ |
| 2 Wh | 7.2 kJ |
| 5 Wh | 18 kJ |
| 10 Wh | 36 kJ |
| 20 Wh | 72 kJ |
| 50 Wh | 180 kJ |
| 100 Wh | 360 kJ |
| 500 Wh | 1,800 kJ |
| 1,000 Wh | 3,600 kJ |
About the watt-hour
The watt-hour (Wh) is a unit of energy. One watt-hour equals 3,600 joule (base unit) in this calculator.
All watt-hour conversionsAbout the kilojoule
The kilojoule (kJ) is a unit of energy. One kilojoule equals 1,000 joule (base unit) in this calculator.
All kilojoule conversionsCommon questions
What is 1 Wh in kJ?
One watt-hour equals 3.6 kJ. Use the formula above for other values.
Why might another calculator show a different last digit?
Calculators may round at different stages or use different unit conventions. We keep full JavaScript numeric precision during calculation and round only for display. Choose up to 15 significant digits. Check US versus UK units and the notes for this category.
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