1 joule to watt hours
1 J = 0.00027778 Wh. Change the amount below, or read the formula and the reference table further down.
1 joule equals
watt hours
1 J = 0.00027778 Wh
The formula
Joules and watt hours both measure energy from the same zero, so a single multiplier does the job.
Wh = J × 0.0002777778
Going the other way? Convert watt hours to joules.
Joules to watt hours table
Values either side of 1 J.
| Joules (J) | Watt hours (Wh) |
|---|---|
| -4 | -0.001111 |
| -3.5 | -0.000972 |
| -3 | -0.000833 |
| -2.5 | -0.000694 |
| -2 | -0.000556 |
| -1.5 | -0.000417 |
| -1 | -0.000278 |
| -0.5 | -0.000139 |
| 0 | 0 |
| 0.5 | 0.000139 |
| 1 | 0.000278 |
| 1.5 | 0.000417 |
| 2 | 0.000556 |
| 2.5 | 0.000694 |
| 3 | 0.000833 |
| 3.5 | 0.000972 |
| 4 | 0.001111 |
| 4.5 | 0.00125 |
| 5 | 0.001389 |
| 5.5 | 0.001528 |
| 6 | 0.001667 |
Questions people ask
- How many watt hours are in a joule?
- One joule equals 0.0002777778 watt hours.
- How do I convert joules to watt hours by hand?
- Multiply the number of joules by 0.0002777778. For a rough check, 0 is close enough for most everyday use.
- What is 1 joule in watt hours?
- 1 joule is 0.00027778 watt hours.
Calcuit generates this page from a unit table, so the factors here match every other page on the site.