Free instant kJ → Wh converter. No signup, no uploads — everything is calculated privately in your browser.
1 kJ = 0.277778 watt-hours
1 kilojoules = 0.277778 watt-hours
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1 kilojoule equals 0.277778 watt-hours. To convert kilojoules to watt-hours, divide the value by 3.6.
1 kilojoule = 0.277778 watt-hours. Formula: value ÷ 3.6
Example: 1 kJ → 0.277778 Wh. Type any value in the converter above to see it converted live.
| Kilojoules (kJ) | Watt-hours (Wh) |
|---|---|
| 1 kJ | 0.277778 Wh |
| 2 kJ | 0.555556 Wh |
| 5 kJ | 1.38889 Wh |
| 10 kJ | 2.77778 Wh |
| 25 kJ | 6.94444 Wh |
| 50 kJ | 13.8889 Wh |
| 100 kJ | 27.7778 Wh |
| 250 kJ | 69.4444 Wh |
| 500 kJ | 138.889 Wh |
| 1,000 kJ | 277.778 Wh |
1 kilojoule = 0.277778 watt-hours. Formula: value ÷ 3.6. Enter the value above and the result appears instantly — the calculation runs entirely in your browser.
Exactly: 1 kilojoule = 0.2777777777777778 watt-hours. The reverse factor is 1 watt-hour = 3.6 kilojoules.
1 kJ = 0.277778 Wh; 10 kJ = 2.77778 Wh; 100 kJ = 27.7778 Wh. Use the full conversion table below for more reference values.
No — and the capital letter matters. A food Calorie (with a capital C) is a kilocalorie: 1,000 small calories. This converter treats them correctly: 1 kcal = 4.184 kJ = 1,000 cal. Energy labels on food almost always mean kilocalories, even where the label just says "calories".