Convert Watt-hours to Kilojoules
One watt-hour equals 3.6 kilojoules. Type any value to convert watt-hours to kilojoules instantly — with a full reference table below.
Convert Watt-hours to Kilojoules
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Conversion formula
To convert watt-hours to kilojoules, multiply by 3.6. One watt-hour equals 3.6 kJ, and one kilojoule equals 0.277778 Wh.
Watt-hours to Kilojoules table
About converting Watt-hours to Kilojoules
Watt-hours (Wh) and Kilojoules (kJ) are both units of energy. The exact factor is 1 Wh = 3.6 kJ, so multiply by 3.6 to go from watt-hours to kilojoules (or divide to go back).
The conversion is exact and runs entirely in your browser. Need the reverse? Use the Kilojoules to Watt-hours converter, or the full unit converter for every unit at once.
Frequently asked questions
How many kilojoules are in one watt-hour?
One watt-hour equals 3.6 kilojoules.
How do I convert watt-hours to kilojoules?
Multiply the number of watt-hours by 3.6. For example, 10 watt-hours = 36 kilojoules.
What is 5 watt-hours in kilojoules?
5 watt-hours is 18 kilojoules.