Watt-hour to Kilojoule
Convert Wh to kJ 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 Kilojoule (kJ)
The Kilojoule is equal to 1,000 joules, the unit used on nutrition labels in most countries outside the US alongside (or instead of) Calories.
How to convert Wh to kJ
- Enter the value in Wh in the box above.
- The kJ equivalent updates instantly.
- Use the swap button to convert kJ back to Wh just as easily.