Joules to Watt-hours Converter
Convert joules to watt-hours (J to Wh) instantly. 1 joules equals 0.000278 watt-hours and 1 watt-hours equals 3,600 joules. Use the swap button to convert the other way.
- Free
- No signup
- Private: runs in your browser
- Works on mobile
Joules to Watt-hours Converter tool
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Quick conversion table
| Joules | Watt-hours |
|---|---|
| 1 | 0.000278 |
| 2 | 0.000556 |
| 5 | 0.001389 |
| 10 | 0.002778 |
| 25 | 0.006944 |
| 50 | 0.013889 |
| 100 | 0.027778 |
| 1,000 | 0.277778 |
How to use Joules to Watt-hours Converter
- Type the value you want to convert.
- Choose the "from" and "to" units, or press Swap units.
- Read the converted value and copy it.
Why use DocConvertPRO?
- Free to use with no signup or watermark.
- Everything runs in your browser. Your input is not uploaded.
- Works on phones, tablets and computers.
- Made for Indian users: rupees, lakh/crore formats and local use cases.
About this tool
Multiply the value in joules by 0.000278 to get watt-hours.
In electricity bills one "unit" means one kilowatt-hour (kWh).
Frequently asked questions
How many watt-hours are in 1 joules?
1 joules = 0.000278 watt-hours.
How do I convert J to Wh?
Multiply the value in joules by 0.000278 to get watt-hours.
How do I convert Wh back to J?
Use the swap button above or open the Watt-hours to Joules converter. 1 watt-hours = 3,600 joules.
Is this converter accurate?
It uses exact or internationally standard conversion factors and shows up to 10 significant digits.