A watt-hour (Wh) is the energy delivered by one watt of power sustained for one hour, equal to 3,600 joules.
Watt hours to Centijoules
Convert Watt-hour (Wh) to Centijoule (cJ) instantly with an exact formula, conversion table, and FAQ.
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Convert watt hours (Wh) to centijoules (cJ) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A centijoule (cJ) is a metric-prefixed unit of energy equal to 10-2 joules, a fraction of a single joule, using the SI centi prefix.
cJ = Wh × 360000
Results update instantly for Watt hours to Centijoules conversions.
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Formula
cJ = Wh × 360000
Wh = cJ × 0.000002777777778
Conversion table
| 1 Wh | 360000 cJ |
| 5 Wh | 1.800000e+06 cJ |
| 10 Wh | 3.600000e+06 cJ |
| 20 Wh | 7.200000e+06 cJ |
| 50 Wh | 1.800000e+07 cJ |
| 100 Wh | 3.600000e+07 cJ |
| 500 Wh | 1.800000e+08 cJ |
| 1000 Wh | 3.600000e+08 cJ |
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How the formula works
Both watt-hour and centijoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in watt hours by 360000 to get centijoules. To reverse the conversion, multiply a centijoule value by 0.000002777777778 to get back to watt hours.
Frequently asked questions
What is Watt-hour (Wh)?
A watt-hour (Wh) is the energy delivered by one watt of power sustained for one hour, equal to 3,600 joules.
What is Centijoule (cJ)?
A centijoule (cJ) is a metric-prefixed unit of energy equal to 10-2 joules, a fraction of a single joule, using the SI centi prefix.
How do I convert watt hours to centijoules?
Multiply the watt-hour value by 360000 to get the equivalent in centijoules. For example, 5 Wh × 360000 = 1.800000e+06 cJ.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 360000 is an exact, non-rounded value.
Can I convert centijoules back to watt hours?
Yes. Divide the centijoule value by 360000, or multiply it by 0.000002777777778, to get watt hours.
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About converting watt hours to centijoules
A watt-hour (Wh) is the energy delivered by one watt of power sustained for one hour, equal to 3,600 joules. A centijoule (cJ) is a metric-prefixed unit of energy equal to 10-2 joules, a fraction of a single joule, using the SI centi prefix.
Use this calculator to move between watt hours and centijoules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.