Joules to watt-hours converter
Watt-hours (Wh)
1 joule = 0.0002777777778 watt-hours
How to convert joules to watt-hours
Wh = J × 0.000277777777778
Multiply the number of joules by 0.000277777777778 to get watt-hours. Going the other way, divide by 0.000277777777778 (or multiply by 3600).
One joule is exactly defined as 0.000277777777778 watt-hours (to 12 significant figures), and one watt-hour is 3600 joules.
Worked examples
- Convert 5 joules: 5 × 0.000277777777778 = 0.001388888889 0.001388888889 watt-hours.
- Convert 12.5 joules: 12.5 × 0.000277777777778 = 0.003472222222 0.003472222222 watt-hours.
- Convert 250 joules: 250 × 0.000277777777778 = 0.06944444444 0.06944444444 watt-hours.
Quick-reference table
| 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 |
| 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 |
Related conversions
Frequently asked questions
How many watt-hours are in 1 joule?
1 joule equals 0.0002777777778 watt-hours.
What is the formula to convert joules to watt-hours?
Use Wh = J × 0.000277777777778. Multiply the number of joules by 0.000277777777778 to get watt-hours. Going the other way, divide by 0.000277777777778 (or multiply by 3600).
What is 100 joules in watt-hours?
100 joules is 0.02777777778 watt-hours.