joules to watt-hours
Convert joule to watt-hour — instant, free, with the formula shown.
1 J=0.000278 Wh
How to convert joule to watt-hour
To convert joule to watt-hour, multiply by 0.00027778:
Wh = J × 0.00027778
For example, 10 J × 0.000278 = 0.002778 Wh.
J to Wh conversion table
| joules (J) | watt-hours (Wh) |
|---|---|
| 1 J | 0.000278 Wh |
| 2 J | 0.000556 Wh |
| 5 J | 0.001389 Wh |
| 10 J | 0.002778 Wh |
| 25 J | 0.006944 Wh |
| 50 J | 0.013889 Wh |
| 100 J | 0.027778 Wh |
| 250 J | 0.069444 Wh |
| 500 J | 0.138889 Wh |
| 1000 J | 0.277778 Wh |
Other joule conversions
Convert to watt-hour from another unit
J to Wh — frequently asked
How many watt-hours are in 1 joule?
1 joule = 0.000278 watt-hours (J × 0.000278 = Wh).
What is the formula to convert joule to watt-hour?
Multiply your joule value by 0.00027778 to get watt-hour.
How do I convert 10 joules to watt-hours?
10 J = 0.002778 Wh. For 100 J the answer is 0.027778 Wh. Use the calculator on this page for any other value.