Watt-Hour to Joule Converter
Convert watt-hour to joule instantly.
Standard energy units
joule 360000
kilojoule 360
calorie 86042.065
kilocalorie 86.042
kilowatt-hour 0.1
BTU 341.213
Fun comparisons
apples eaten 🍎~ 1.04
hours of 100W bulb 💡~ 1
marathons run 🏃~ 0.12
full car tanks of fuel ⛽~ Less than 0.01
How to convert watt-hour to joule
Enter your energy value in watt-hour and see the result in joule instantly. Key reference points: 1 food Calorie equals 1 kcal (4.184 kJ), and 1 kilowatt-hour equals 3600 kJ (860 kcal).
Watt-hour measures energy consumed by electrical devices; joule is the SI energy unit used in physics. One watt-hour equals exactly 3600 joules.
Need the opposite direction? Convert joule to watt-hour just as easily, or explore all our energy conversions.
Common watt-hour to joule conversions
| Watt-Hour (Wh) | Joule (J) |
|---|---|
| 1 | 3600 |
| 5 | 18000 |
| 10 | 36000 |
| 25 | 90000 |
| 50 | 18 |
| 100 | 36 |
| 500 | 18 |
| 1000 | 36 |
Frequently asked questions
1 watt-hour equals 3600 joule.
Multiply by 3600. For example, 5 Wh = 18000 J.
A 10 Wh phone battery holds 36,000 joules of energy.
1 joule equals 0.000277778 watt-hour.
100 watt-hour equals 36 joule.