Joules to Watt-hours Converter
1 Joule = 0.000277778 Watt-hours
J
Wh
1 J = 0.000277778 Wh. To convert joules to watt-hours, multiply by 0.000277778; to convert back, multiply by 3,600.
Conversion formula
1 J = 0.000277778 Wh
To convert from Joules to Watt-hours, multiply the value in joules by 0.000277778.
| Joules (J) | Watt-hours (Wh) |
|---|---|
| 0.001 | 2.77778e-7 |
| 0.01 | 0.00000277778 |
| 0.1 | 0.0000277778 |
| 1 | 0.000277778 |
| 2 | 0.000555556 |
| 5 | 0.00138889 |
| 10 | 0.00277778 |
| 25 | 0.00694444 |
| 50 | 0.0138889 |
| 100 | 0.0277778 |
| 250 | 0.0694444 |
| 500 | 0.138889 |
| 1000 | 0.277778 |
1 joule in every energy unit
| Kilojoules | 0.001 kJ |
| Megajoules | 0.000001 MJ |
| Calories | 0.239006 cal |
| Kilocalories | 0.000239006 kcal |
| Watt-hours | 0.000277778 Wh |
| Kilowatt-hours | 2.77778e-7 kWh |
| British Thermal Units | 0.000947817 BTU |
Frequently Asked Questions
How many watt-hours are in 1 joule?
1 joule equals 0.000277778 watt-hours. So 10 joules are 0.00277778 watt-hours and 100 joules are 0.0277778 watt-hours.
How do I convert joules to watt-hours by hand?
Multiply the number of joules by 0.000277778. To go the other way, multiply watt-hours by 3,600 (or divide by 0.000277778).
How many joules are in 1 watt-hour?
1 watt-hour equals 3,600 joules.