Kilojoules to Watt-hours Converter
Convert kilojoules (kJ) to watt-hours (Wh)
Result
0.2777777778 Wh
Watt-hours
1 kJ = 0.2777777778 Wh
1 kJ in other units
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How to convert kilojoules to watt-hours
One kilojoule equals 0.2777778 watt-hours, so multiply the number of kilojoules by 0.2777778.
Wh = kJ × 0.2777778
1 kJ = 0.2777778 Wh · 1 Wh = 3.6 kJ
Worked example
To convert 5 kilojoules to watt-hours: 5 kJ × 0.2777778 = 1.388889 Wh.
About kilojoules (kJ)
A kilojoule is 1,000 J. Food labels in many countries show energy in kJ alongside kcal.
About watt-hours (Wh)
A watt-hour is the energy of one watt for one hour (3,600 J), used for battery capacity.
More conversions
Kilojoules to other units
Frequently asked questions
How many watt-hours are in one kilojoule?
One kilojoule equals 0.2777778 watt-hours.
How many kilojoules are in one watt-hour?
One watt-hour equals 3.6 kilojoules.
How do I convert kilojoules to watt-hours?
Use the formula Wh = kJ × 0.2777778. For example, 5 kJ × 0.2777778 = 1.388889 Wh.