Energy
Joule to Watt-hours
Convert joule to watt-hours instantly.
About this conversion
Joule (J) er SI-grundenheden for energi og bruges i fysik, kemi og teknik. At løfte et æble én meter kræver ca. 1 joule, og en menneskekrops daglige energibehov er ca. 8 millioner joule. 1.000 joule er én kilojoule. Watt-hours (Wh) are used for battery capacity and electricity consumption reports. 3,600 joule equal 1 Watt-hours. The converter above calculates the result instantly — you can also swap the units to convert in the other direction.
How to use
Enter a value in the joule field and instantly see the result in watt-hours. Click the swap button to reverse the conversion.
Manual calculation
1 joule = 0.00027778 watt-hours. Example: 10 J = 0.0027778 Wh.
Frequently asked questions
How do you convert joule to watt-hours?
Divide the number of joule by 3,600 to get watt-hours. Example: 10,000 J ÷ 3,600 = 2.7778 Wh.
Are joule bigger or smaller than watt-hours?
Joule is smaller than Watt-hours. There are 3,600 joule in one watt-hour, so the result is a smaller number when converting from joule to watt-hours.
What is 1,000 joule in watt-hours?
1,000 J equals 0.27778 Wh.
How many joule are in 1 watt-hour?
1 Wh equals 3,600 J. This is the reverse conversion — useful if you have a value in watt-hours and want it in joule.
What is joule?
Joule (J) er SI-grundenheden for energi og bruges i fysik, kemi og teknik. At løfte et æble én meter kræver ca. 1 joule, og en menneskekrops daglige energibehov er ca. 8 millioner joule. 1.000 joule er én kilojoule.
What is watt-hour used for?
Watt-hours (Wh) are used for battery capacity and electricity consumption reports.