Watt-hours to joules converter
Joules (J)
1 watt-hour = 3,600 joules
How to convert watt-hours to joules
J = Wh × 3600
Multiply the number of watt-hours by 3600 to get joules. Going the other way, divide by 3600 (or multiply by 0.000277777777778).
One watt-hour is exactly defined as 3600 joules (to 12 significant figures), and one joule is 0.000277777777778 watt-hours.
Worked examples
- Convert 5 watt-hours: 5 × 3600 = 18,000 18,000 joules.
- Convert 12.5 watt-hours: 12.5 × 3600 = 45,000 45,000 joules.
- Convert 250 watt-hours: 250 × 3600 = 900,000 900,000 joules.
Quick-reference table
| Wh | J |
|---|---|
| 1 | 3,600 |
| 2 | 7,200 |
| 3 | 10,800 |
| 5 | 18,000 |
| 10 | 36,000 |
| 15 | 54,000 |
| 20 | 72,000 |
| 25 | 90,000 |
| 50 | 180,000 |
| 75 | 270,000 |
| 100 | 360,000 |
| 1,000 | 3,600,000 |
| J | Wh |
|---|---|
| 1 | 0.0002777777778 |
| 2 | 0.0005555555556 |
| 3 | 0.0008333333333 |
| 5 | 0.001388888889 |
| 10 | 0.002777777778 |
| 15 | 0.004166666667 |
| 20 | 0.005555555556 |
| 25 | 0.006944444444 |
| 50 | 0.01388888889 |
| 75 | 0.02083333333 |
| 100 | 0.02777777778 |
| 1,000 | 0.2777777778 |
Related conversions
Frequently asked questions
How many joules are in 1 watt-hour?
1 watt-hour equals 3,600 joules.
What is the formula to convert watt-hours to joules?
Use J = Wh × 3600. Multiply the number of watt-hours by 3600 to get joules. Going the other way, divide by 3600 (or multiply by 0.000277777777778).
What is 100 watt-hours in joules?
100 watt-hours is 360,000 joules.