A kilowatt-hour (kWh) is the standard billing unit for electricity, equal to 1,000 watts sustained for one hour.
Kilowatt hours to Joules
Convert Kilowatt-hour (kWh) to Joule (J) instantly with an exact formula, conversion table, and FAQ.
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Convert kilowatt-hours (kWh) to joules (J) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
The joule (J) is the SI derived unit of energy, equal to the work done when a force of one newton acts over one meter.
J = kWh × 3600000
Results update instantly for Kilowatt hours to Joules conversions.
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Formula
J = kWh × 3600000
kWh = J × 2.777777778e-07
Conversion table
| 1 kWh | 3.600000e+06 J |
| 5 kWh | 1.800000e+07 J |
| 10 kWh | 3.600000e+07 J |
| 20 kWh | 7.200000e+07 J |
| 50 kWh | 1.800000e+08 J |
| 100 kWh | 3.600000e+08 J |
| 500 kWh | 1.800000e+09 J |
| 1000 kWh | 3.600000e+09 J |
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How the formula works
Both kilowatt-hour and joule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in kilowatt-hours by 3600000 to get joules. To reverse the conversion, multiply a joule value by 2.777777778e-07 to get back to kilowatt-hours.
Frequently asked questions
What is Kilowatt-hour (kWh)?
A kilowatt-hour (kWh) is the standard billing unit for electricity, equal to 1,000 watts sustained for one hour.
What is Joule (J)?
The joule (J) is the SI derived unit of energy, equal to the work done when a force of one newton acts over one meter.
How do I convert kilowatt-hours to joules?
Multiply the kilowatt-hour value by 3600000 to get the equivalent in joules. For example, 5 kWh × 3600000 = 1.800000e+07 J.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 3600000 is an exact, non-rounded value.
Can I convert joules back to kilowatt-hours?
Yes. Divide the joule value by 3600000, or multiply it by 2.777777778e-07, to get kilowatt-hours.
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About converting kilowatt-hours to joules
A kilowatt-hour (kWh) is the standard billing unit for electricity, equal to 1,000 watts sustained for one hour. The joule (J) is the SI derived unit of energy, equal to the work done when a force of one newton acts over one meter.
Use this calculator to move between kilowatt-hours and joules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.