Free instant Wh → kJ converter. No signup, no uploads — everything is calculated privately in your browser.
1 Wh = 3.6 kilojoules
1 watt-hours = 3.6 kilojoules
Free, instant, and 100% private — every calculation runs in your browser. Nothing is uploaded.
1 watt-hour equals 3.6 kilojoules. To convert watt-hours to kilojoules, multiply the value by 3.6.
1 watt-hour = 3.6 kilojoules. Formula: value × 3.6
Example: 1 Wh → 3.6 kJ. Type any value in the converter above to see it converted live.
| Watt-hours (Wh) | Kilojoules (kJ) |
|---|---|
| 1 Wh | 3.6 kJ |
| 2 Wh | 7.2 kJ |
| 5 Wh | 18 kJ |
| 10 Wh | 36 kJ |
| 25 Wh | 90 kJ |
| 50 Wh | 180 kJ |
| 100 Wh | 360 kJ |
| 250 Wh | 900 kJ |
| 500 Wh | 1,800 kJ |
| 1,000 Wh | 3,600 kJ |
1 watt-hour = 3.6 kilojoules. Formula: value × 3.6. Enter the value above and the result appears instantly — the calculation runs entirely in your browser.
Exactly: 1 watt-hour = 3.6 kilojoules. The reverse factor is 1 kilojoule = 0.2777777777777778 watt-hours.
1 Wh = 3.6 kJ; 10 Wh = 36 kJ; 100 Wh = 360 kJ. 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".