Convert watt hours to joules and joules to Wh instantly. Bidirectional energy converter with formula and common values.
Multiply the watt hour value by 3,600 to get joules. The watt hour is a practical energy unit used for batteries and electronics, while the joule is the SI standard.
| Watt Hours | Joules |
|---|---|
| 2 | 7,200 |
| 5 | 18,000 |
| 12 | 43,200 |
| 25 | 90,000 |
| 50 | 180,000 |
| 75 | 270,000 |
| 100 | 360,000 |
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One watt hour equals exactly 3,600 joules. This is because one watt equals one joule per second, and one hour has 3,600 seconds.
Multiply the watt hour value by 3,600. For example, 4.7 Wh × 3,600 = 16,920 J.
A watt measures power (rate of energy transfer). A watt hour measures energy (total amount transferred). Running a 5 W device for 2 hours uses 10 Wh.
Laptop batteries are rated in watt hours (Wh). A typical laptop battery is 50-100 Wh, meaning it stores 180,000 to 360,000 joules of energy.