Joules to Watt-hours Converter
Convert joules to watt-hours instantly. One joule equals 0.000277778 watt-hours, so you can type any value in J and read the answer in Wh. The page…
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Convert joules to watt-hours instantly. One joule equals 0.000277778 watt-hours, so you can type any value in J and read the answer in Wh. The page also shows a conversion table and the exact formula used.
Worked example
Example calculated from the starting values. Enter your own values and press Calculate to get your result.
1 J = 0.000277778 Wh
With the default inputs (value in joules = 1 J), the results are: watt-hours 0.000277778 Wh.
Joules to watt-hours conversion table
Reference table based on the example values; it is not your calculation result.
| joules (J) | watt-hours (Wh) |
|---|---|
| 1 | 0.000277778 |
| 2 | 0.000555556 |
| 5 | 0.00138889 |
| 10 | 0.00277778 |
| 25 | 0.00694444 |
| 50 | 0.0138889 |
| 100 | 0.0277778 |
| 500 | 0.138889 |
| 1,000 | 0.277778 |
Frequently asked questions
How many watt-hours are in one joule?
1 joule = 0.000277778 watt-hours.
What is the formula to convert joules to watt-hours?
Multiply the value in joules by 0.000277778.
How do I convert watt-hours back to joules?
1 watt-hour = 3,600 joules.
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