Converter group
Common Converters
Energy Converter
Result
... Joule = ... Watt-hour
Find the units to convert
Joule to Watt-hour Converter
Use this page to convert joule values into watt-hour, with background details, formulas, a worked example, and a quick conversion table.
Conversion formula
1 J = 0.000277777777777778 Wh
1 Wh = 3,600 J
Example: 120 J = 0.0333333333333333 Wh
Joule
A joule is the work done by a force of one newton through one meter.
History: It is named after James Prescott Joule.
Current use: Joules are used in physics, engineering, and energy calculations.
Also written as J, joules.
Watt-hour
A watt-hour is the energy used by one watt over one hour.
History: It became practical with electrical metering and battery capacity descriptions.
Current use: Watt-hours are used for batteries, devices, solar systems, and electricity use.
Also written as Wh, watt hour, watt hours, watt-hours.
Joule to Watt-hour table
| Joule [J] | Watt-hour [Wh] |
|---|---|
| 0.01 J | 0.00000277777777777778 Wh |
| 0.1 J | 0.0000277777777777778 Wh |
| 1 J | 0.000277777777777778 Wh |
| 2 J | 0.000555555555555556 Wh |
| 5 J | 0.00138888888888889 Wh |
| 10 J | 0.00277777777777778 Wh |
| 20 J | 0.00555555555555556 Wh |
| 50 J | 0.0138888888888889 Wh |
| 100 J | 0.0277777777777778 Wh |
Frequently asked questions
How many Watt-hour (Wh) are in one Joule (J)?
One Joule equals 0.000277777777777778 Watt-hour.
How do you convert Joule to Watt-hour?
Multiply the Joule value by 0.000277777777777778 to get the result in Watt-hour.
How do you convert Watt-hour back to Joule?
Multiply the Watt-hour value by 3,600 to get back to Joule.
What is 120 Joule in Watt-hour?
120 Joule equals 0.0333333333333333 Watt-hour.