Convert watt-hours to kilojoules quickly and accurately using this free online converter
Used in nutrition labels, physics, and electricity consumption.
💡 Calories (kcal) are used in food; joules in science; kWh in electricity.
kJ = Wh × 3.6
Example: 1 Wh × 3.6 = 3.6 kJ
Use kcal for food; kWh for energy consumption; joules for science.
Common uses: nutrition, electricity bills, and scientific calculations.
How do I convert Wh to kJ?
Multiply the value in Watt-hours by 3.6. For example: 10 Wh = 36 kJ.
When should I use Kilojoules instead of Watt-hours?
Use kcal for food; kWh for energy consumption; joules for science.
Is this converter accurate?
Yes. We use internationally recognized conversion factors, updated to current standards.
| Watt-hours (Wh) | Kilojoules (kJ) |
|---|---|
| 1 Wh | 3.6 kJ |
| 10 Wh | 36 kJ |
| 50 Wh | 180 kJ |
| 100 Wh | 360 kJ |
| 250 Wh | 900 kJ |
| 500 Wh | 1800 kJ |
| 1000 Wh | 3600 kJ |
| 2000 Wh | 7200 kJ |