Wh to J
Convert Watt-hour to Joule
Convert Watt-hour to Joule instantly with the tool above. The conversion factor is 3,600, meaning 1 watt-hour equals 3,600 joules. Type any value and the result updates immediately — no ads, no page reloads, no clutter.
Type a number above. The result updates instantly — no buttons, no reloads.
1 Watt-hour = 3,600 joules
1 Joule = 0.000277777778 watt-hours
Quick reference
Common watt-hours converted to joules at a glance.
| Wh | J |
|---|---|
| 1 | 3,600 |
| 2 | 7,200 |
| 5 | 18,000 |
| 10 | 36,000 |
| 25 | 90,000 |
| 50 | 180,000 |
| 100 | 360,000 |
| 500 | 1,800,000 |
| 1,000 | 3,600,000 |
How to convert watt-hours to joules
To convert a value from watt-hours to joules, multiply the watt-hour value by 3,600 joules. For example, 10 watt-hours × that factor = 36,000 joules.
This watt-hour to joule converter runs entirely in your browser, so results appear instantly with no page reload, no advertisements and no sign-up.
Frequently asked questions
How many joules are in 1 watt-hour?+
1 watt-hour is equal to 3,600 joules.
How do you convert watt-hours to joules?+
To convert watt-hours to joules, multiply the watt-hour value by 3,600. For example, 10 watt-hours × 3,600 = 36,000 joules.
What is the formula to convert watt-hours to joules?+
Watt-hour → Joule: value × 3,600. Equivalently, 1 watt-hour = 3,600 joules.
Is this Watt-hour to Joule converter free to use?+
Yes. This watt-hour to joule converter is completely free, works instantly in your browser, and contains no advertisements, popups or sign-up.