Convert watt hours to joules
1 Wh = 3,600 J. Change the amount below, or read the formula and the reference table further down.
1 watt hour equals
joules
1 Wh = 3,600 J
The formula
Watt hours and joules both measure energy from the same zero, so a single multiplier does the job.
J = Wh × 3,600
Going the other way? Convert joules to watt hours.
Watt hours to joules table
Common values, rounded for reading.
| Watt hours (Wh) | Joules (J) |
|---|---|
| 1 | 3,600 |
| 2 | 7,200 |
| 3 | 10,800 |
| 4 | 14,400 |
| 5 | 18,000 |
| 6 | 21,600 |
| 7 | 25,200 |
| 8 | 28,800 |
| 9 | 32,400 |
| 10 | 36,000 |
| 15 | 54,000 |
| 20 | 72,000 |
| 25 | 90,000 |
| 30 | 108,000 |
| 40 | 144,000 |
| 50 | 180,000 |
| 75 | 270,000 |
| 100 | 360,000 |
| 250 | 900,000 |
| 500 | 1,800,000 |
| 1,000 | 3,600,000 |
Questions people ask
- How many joules are in a watt hour?
- One watt hour equals 3,600 joules.
- How do I convert watt hours to joules by hand?
- Multiply the number of watt hours by 3,600. For a rough check, 3,600 is close enough for most everyday use.
- What is 1 watt hour in joules?
- 1 watt hour is 3,600 joules.
Calcuit generates this page from a unit table, so the factors here match every other page on the site.