Kilojoule to Watt-hour
Convert kJ to Wh instantly — free, no sign-up.
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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.
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.
How to convert kJ to Wh
- Enter the value in kJ in the box above.
- The Wh equivalent updates instantly.
- Use the swap button to convert Wh back to kJ just as easily.