Watt-hours to Joules (Wh to J)
Free online watt-hour to joule converter. Type a value, get an instant exact result — plus the formula, a ready-made conversion table, and reverse conversion.
ENERGY CONVERTER — INSTANT RESULT
Formula: multiply the watt-hour value by 3,600 — i.e. J = Wh × 3,600
Quick check: 1 Wh = 3,600 J
Quick check: 1 Wh = 3,600 J
Watt-hours to Joules conversion table
| Watt-hours (Wh) | Joules (J) |
|---|---|
| 1 Wh | 3,600 J |
| 2 Wh | 7,200 J |
| 3 Wh | 10,800 J |
| 4 Wh | 14,400 J |
| 5 Wh | 18,000 J |
| 6 Wh | 21,600 J |
| 7 Wh | 25,200 J |
| 8 Wh | 28,800 J |
| 9 Wh | 32,400 J |
| 10 Wh | 36,000 J |
| 15 Wh | 54,000 J |
| 20 Wh | 72,000 J |
| 25 Wh | 90,000 J |
| 30 Wh | 108,000 J |
| 40 Wh | 144,000 J |
| 50 Wh | 180,000 J |
| 75 Wh | 270,000 J |
| 100 Wh | 360,000 J |
| 250 Wh | 900,000 J |
| 500 Wh | 1,800,000 J |
| 1,000 Wh | 3,600,000 J |
How to convert watt-hours to joules
To convert watt-hours to joules, multiply the amount in watt-hours by 3,600. For example, 10 Wh = 36,000 J. To convert in the other direction, divide by the same factor, or use the ⇄ swap button above.
Convert between joules, calories, BTU, kilowatt-hours and foot-pounds. The joule is the SI unit of energy; the thermochemical calorie is defined as exactly 4.184 J.
Frequently asked questions
How many joules are in one watt-hour?
One watt-hour is exactly 3,600 joules.
How do I convert Wh to J?
Multiply the Wh value by 3,600 to get J. The converter at the top of this page does this automatically and works in both directions.
How much is 100 watt-hours in joules?
100 watt-hours equals 360,000 joules.