Watt-hour to Joule
Convert Wh to J instantly — free, no sign-up.
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About the Watt-hour (Wh)
The Watt-hour is the energy delivered by one watt of power sustained for one hour — commonly used to rate small battery capacities like phone power banks.
About the Joule (J)
The Joule is the SI unit of energy, defined as the work done by one newton of force over one meter — a single joule is roughly the energy released dropping an apple one meter.
How to convert Wh to J
- Enter the value in Wh in the box above.
- The J equivalent updates instantly.
- Use the swap button to convert J back to Wh just as easily.