Kilowatt-hour to Kilojoule Converter
Convert kilowatt-hours to kilojoules (kWh to kJ) instantly with this free online energy converter. Enter any value in the Kilowatt-hour field and get the equivalent in Kilojoule immediately. This converter handles any quantity — from tiny fractions to large numbers — with full precision. No signup, no ads in the widget, and the conversion runs entirely in your browser for instant results.
The conversion factor is exact: 1 kWh = 3600 kJ. To convert kilowatt-hours to kilojoules, multiply your Kilowatt-hour value by 3600. For example, 10 kWh = 36000 kJ. You can also reverse the calculation: 1 kJ = 0.0002777777778 kWh.
Quick conversion table
| Kilowatt-hour (kWh) | Kilojoule (kJ) |
|---|---|
| 1 kWh | 3600 kJ |
| 5 kWh | 18000 kJ |
| 10 kWh | 36000 kJ |
| 25 kWh | 90000 kJ |
| 50 kWh | 180000 kJ |
| 100 kWh | 360000 kJ |
Use the swap button to reverse the direction, or choose a different unit from the dropdown menus to convert within the energy category.
Formula
Kilowatt-hour to Kilojoule conversion: 1 kWh = 3600 kJ kilojoules = kilowatt-hours × 3600 1 kJ = 0.0002777777778 kWh kilowatt-hours = kilojoules × 0.0002777777778
Example
Example: Convert 10 kWh to kJ: 10 kWh × 3600 = 36000 kJ So, 10 kWh is about 36000 kJ. To convert back, multiply by 0.0002777777778: 36000 kJ × 0.0002777777778 = 10 kWh.
How to Use
- Enter the value you want to convert in the Kilowatt-hour field
- The result in Kilojoule appears instantly below
- Use the dropdown menus to change units if needed
- Click 'Swap Units' to reverse the conversion direction
- Copy the result or adjust the input for a new conversion
Frequently Asked Questions
How do I convert kilowatt-hours to kilojoules?
Enter the value in Kilowatt-hour (kWh) in the 'From' field. The equivalent in Kilojoule (kJ) appears instantly in the 'To' field. The converter uses precise conversion factors and updates in real time as you type.
What is the formula to convert kWh to kJ?
1 kWh = 3600 kJ, so kilojoules = kilowatt-hours × 3600. To convert back, 1 kJ = 0.0002777777778 kWh. The full formula and a worked example are shown on this page.
How many kilojoules are in one Kilowatt-hour?
1 kWh = 3600 kJ.
Is this Kilowatt-hour to Kilojoule converter free?
Yes, completely free with no signup, no limits, and no ads in the converter widget. You can convert as many values as you need. The tool runs entirely in your browser, so your data never leaves your device.
Can I convert kilojoules back to kilowatt-hours?
Yes. Click the 'Swap Units' button to reverse the direction. You can also use the dropdown menus to select any other energy unit for either field.
How accurate is the kWh to kJ conversion?
The converter uses high-precision conversion factors (up to 8 decimal places). Results are displayed with up to 6 decimal places, with trailing zeros removed for readability. For scientific or engineering work, always verify with official standards.