Joules to Watt Hours Converter
EngineeringJoules, calories, kilowatt-hours and more.
How to convert Joules to Watt Hours
Multiply the joules value by 0.000277778: 1 J = 0.000277778 Wh. Going the other way, 1 Wh = 3,600 J, so divide by 0.000277778 or use the Watt Hours to Joules converter.
About these units
Joules (J)
The joule is the SI unit of energy: the work done by a force of one newton over one meter. Lifting a small apple one meter takes about one joule.
Watt Hours (Wh)
A watt-hour is the energy of one watt sustained for one hour, exactly 3,600 joules. Phone and laptop batteries are rated in watt-hours.
Joules to Watt Hours conversion table
| Joules (J) | Watt Hours (Wh) |
|---|---|
| 1 J | 0.000277778 Wh |
| 2 J | 0.000555556 Wh |
| 3 J | 0.000833333 Wh |
| 4 J | 0.00111111 Wh |
| 5 J | 0.00138889 Wh |
| 10 J | 0.00277778 Wh |
| 20 J | 0.00555556 Wh |
| 25 J | 0.00694444 Wh |
| 50 J | 0.0138889 Wh |
| 100 J | 0.0277778 Wh |
| 500 J | 0.138889 Wh |
| 1,000 J | 0.277778 Wh |
More joules conversions
- Joules to Kilojoules1 J = 0.001 kJ
- Joules to Megajoules1 J = 1e-6 MJ
- Joules to Gigajoules1 J = 1e-9 GJ
- Joules to Millijoules1 J = 1,000 mJ
- Joules to Microjoules1 J = 1e+6 µJ
- Joules to Nanojoules1 J = 1e+9 nJ
- Joules to Calories1 J = 0.239006 cal
- Joules to British Thermal Units1 J = 0.000947813 BTU
- Joules to Ergs1 J = 1e+7 erg
See every unit on the Energy Converter.