watt-hours (Wh) to joules Converter
Convert watt-hours (Wh) to joules instantly. Includes a reference table and formula.
| watt-hours (Wh) | joules |
|---|
How to convert watt-hours (Wh) to joules
Enter your value
Type the number of watt-hours (wh) you want to convert into the left box. The result in joules appears instantly in the right box. You can also type into the right box to convert in the other direction.
Use the swap button
Click the ⇄ Swap button to reverse the conversion — joules to watt-hours (Wh). Your current value carries across so you don't have to re-enter anything.
About watt-hours (Wh) and joules
watt-hours (Wh) and joules are measurement units. Use this converter to switch between them instantly.
Worked examples: watt-hours (Wh) to joules
Multiply the watt-hours (Wh) value by 3,600 to get joules. A few quick examples:
- 5 watt-hours (Wh) × 3,600 = 18,000 joules
- 25 watt-hours (Wh) × 3,600 = 90,000 joules
- 250 watt-hours (Wh) × 3,600 = 900,000 joules
Related conversions
1 Wh = 3,600 J. A phone battery (4,500 mAh at 3.7V) = 16.65 Wh = 59,940 J. One hour of LED lighting (9W) = 9 Wh = 32,400 J. The Wh to J conversion shows why energy storage is so hard: even a large battery contains relatively modest joule quantities compared to chemical fuels.
| watt-hours (Wh) | joules |
|---|---|
| 0.1 | 360 |
| 0.5 | 1800 |
| 1 | 3600 |
| 5 | 1.8e+04 |
| 10 | 3.6e+04 |
| 20 | 7.2e+04 |
Frequently asked questions
How do I convert watt-hours (Wh) to joules?
To convert watt-hours (Wh) to joules, multiply by 3600. Or use the calculator above for instant results.
How many joules are in 1 watt-hours (Wh)?
1 watt-hours (Wh) equals 3600 joules.
Is the watt-hours (Wh) to joules converter free?
Yes, the watt-hours (Wh) to joules converter is completely free with no sign-up required, no downloads, and it works offline once the page has loaded.