Joule to Watt-Hour Converter
Convert joule to watt-hour instantly.
Standard energy units
kilojoule 0.1
calorie 23.901
kilocalorie 0.0239
watt-hour 0.0278
kilowatt-hour 0
BTU 0.0948
Fun comparisons
apples eaten 🍎~ Less than 0.01
hours of 100W bulb 💡~ Less than 0.01
marathons run 🏃~ Less than 0.01
full car tanks of fuel ⛽~ Less than 0.01
How to convert joule to watt-hour
Enter your energy value in joule and see the result in watt-hour instantly. Key reference points: 1 food Calorie equals 1 kcal (4.184 kJ), and 1 kilowatt-hour equals 3600 kJ (860 kcal).
Joule is the SI energy unit used in physics; watt-hour measures electrical energy consumption. One watt-hour equals 3600 joules.
Need the opposite direction? Convert watt-hour to joule just as easily, or explore all our energy conversions.
Common joule to watt-hour conversions
| Joule (J) | Watt-Hour (Wh) |
|---|---|
| 1 | 0.000277778 |
| 5 | 0.00138889 |
| 10 | 0.00277778 |
| 25 | 0.00694444 |
| 50 | 0.0138889 |
| 100 | 0.0277778 |
| 500 | 0.138889 |
| 1000 | 0.277778 |
Frequently asked questions
1 joule equals 0.000277778 watt-hour.
Multiply by 0.000277778. For example, 5 J = 0.00138889 Wh.
10,800 joules equals 3 watt-hours.
1 watt-hour equals 3600 joule.
100 joule equals 0.0277778 watt-hour.