Watt-hour (Wh)
The watt-hour measures energy consumed or produced by one watt of power over one hour.
History: the watt-hour came from electrical engineering as the energy of one watt of power over one hour.
Quickly convert watt-hours to kilojoules without lookup tables or manual math.
This page is focused on converting watt-hours to kilojoules. Type a number into the first field and the result appears immediately in the second field.
Example: 1 Wh = 3.6 kJ. Conversion formula: result = value × 3600 / 1000.
Use this converter for everyday calculations, study notes, engineering checks, and quick value verification without installing a separate app.
The watt-hour measures energy consumed or produced by one watt of power over one hour.
History: the watt-hour came from electrical engineering as the energy of one watt of power over one hour.
The kilojoule equals 1000 joules and is convenient for food energy, heat, and engineering calculations.
History: the kilojoule became a convenient multiple of the joule for food, heat, and engineering calculations.
Enter a value in the Watt-hour field. The converter applies the formula "result = value × 3600 / 1000" and immediately shows the result in kilojoules.
1 Wh = 3.6 kJ.
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