Convert Watt-hours to Joules
One watt-hour equals 3,600 joules. Type any value to convert watt-hours to joules instantly — with a full reference table below.
Convert Watt-hours to Joules
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Conversion formula
To convert watt-hours to joules, multiply by 3,600. One watt-hour equals 3,600 J, and one joule equals 0.000278 Wh.
Watt-hours to Joules table
About converting Watt-hours to Joules
Watt-hours (Wh) and Joules (J) are both units of energy. The exact factor is 1 Wh = 3,600 J, so multiply by 3,600 to go from watt-hours to joules (or divide to go back).
The conversion is exact and runs entirely in your browser. Need the reverse? Use the Joules to Watt-hours converter, or the full unit converter for every unit at once.
Frequently asked questions
How many joules are in one watt-hour?
One watt-hour equals 3,600 joules.
How do I convert watt-hours to joules?
Multiply the number of watt-hours by 3,600. For example, 10 watt-hours = 36,000 joules.
What is 5 watt-hours in joules?
5 watt-hours is 18,000 joules.