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.
Centijoules to Watt hours
Convert Centijoule (cJ) to Watt-hour (Wh) instantly with an exact formula, conversion table, and FAQ.
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Convert centijoules (cJ) to watt hours (Wh) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A watt-hour (Wh) is the energy delivered by one watt of power sustained for one hour, equal to 3,600 joules.
Wh = cJ × 0.000002777777778
Results update instantly for Centijoules to Watt hours conversions.
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Formula
Wh = cJ × 0.000002777777778
cJ = Wh × 360000
Conversion table
| 1 cJ | 0.000003 Wh |
| 5 cJ | 0.000014 Wh |
| 10 cJ | 0.000028 Wh |
| 20 cJ | 0.000056 Wh |
| 50 cJ | 0.000139 Wh |
| 100 cJ | 0.000278 Wh |
| 500 cJ | 0.001389 Wh |
| 1000 cJ | 0.002778 Wh |
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How the formula works
Both centijoule and watt-hour measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in centijoules by 0.000002777777778 to get watt hours. To reverse the conversion, multiply a watt-hour value by 360000 to get back to centijoules.
Frequently asked questions
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.
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.
How do I convert centijoules to watt hours?
Multiply the centijoule value by 0.000002777777778 to get the equivalent in watt hours. For example, 5 cJ × 0.000002777777778 = 0.000014 Wh.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 0.000002777777778 is an exact, non-rounded value.
Can I convert watt hours back to centijoules?
Yes. Divide the watt-hour value by 0.000002777777778, or multiply it by 360000, to get centijoules.
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About converting centijoules to watt hours
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. A watt-hour (Wh) is the energy delivered by one watt of power sustained for one hour, equal to 3,600 joules.
Use this calculator to move between centijoules and watt hours accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.