Quick Answer
1 watt-hour equals 3.6 kilojoules. To convert watt-hours to kilojoules, multiply the value by this factor.
Key Facts
- Reverse: 1 kilojoule = 0.277778 watt-hours.
Watt-hours to Kilojoules Converter
Free instant Wh → kJ converter. No signup, no uploads — everything is calculated privately in your browser.
1 Wh = 3.6 kilojoules
Free and instant — every calculation runs in your browser. Nothing is uploaded.
Watt-hours to Kilojoules Formula
Formula: value × 3.6
Prefer to skip the math? Type any value in the converter above and it converts instantly.
Watt-hours to Kilojoules Conversion Table
| 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 |
Frequently Asked Questions
How do I convert watt-hours to kilojoules?
Enter the value above and the result appears instantly — the calculation runs entirely in your browser. Formula: value × 3.6.
What is the exact watt-hours to kilojoules conversion factor?
1 watt-hour = 3.6 kilojoules (shown to 6 significant figures — the converter itself computes at full precision). The reverse factor is 1 kilojoule = 0.277778 watt-hours.
What are some common watt-hours to kilojoules conversions?
1 Wh = 3.6 kJ; 10 Wh = 36 kJ; 100 Wh = 360 kJ. Use the full conversion table below for more reference values.
Is a calorie the same as a food Calorie?
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".
Related Energy Conversions
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