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 Ergs
Convert Watt-hour (Wh) to Erg (erg) instantly with an exact formula, conversion table, and FAQ.
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Convert watt hours (Wh) to ergs (erg) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
An erg is the CGS (centimeter-gram-second) unit of energy, equal to one ten-millionth of a joule.
erg = Wh × 36000000000
Results update instantly for Watt hours to Ergs conversions.
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Formula
erg = Wh × 36000000000
Wh = erg × 2.777777778e-11
Conversion table
| 1 Wh | 3.600000e+10 erg |
| 5 Wh | 1.800000e+11 erg |
| 10 Wh | 3.600000e+11 erg |
| 20 Wh | 7.200000e+11 erg |
| 50 Wh | 1.800000e+12 erg |
| 100 Wh | 3.600000e+12 erg |
| 500 Wh | 1.800000e+13 erg |
| 1000 Wh | 3.600000e+13 erg |
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How the formula works
Both watt-hour and erg measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in watt hours by 36000000000 to get ergs. To reverse the conversion, multiply a erg value by 2.777777778e-11 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 Erg (erg)?
An erg is the CGS (centimeter-gram-second) unit of energy, equal to one ten-millionth of a joule.
How do I convert watt hours to ergs?
Multiply the watt-hour value by 36000000000 to get the equivalent in ergs. For example, 5 Wh × 36000000000 = 1.800000e+11 erg.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 36000000000 is an exact, non-rounded value.
Can I convert ergs back to watt hours?
Yes. Divide the erg value by 36000000000, or multiply it by 2.777777778e-11, to get watt hours.
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About converting watt hours to ergs
A watt-hour (Wh) is the energy delivered by one watt of power sustained for one hour, equal to 3,600 joules. An erg is the CGS (centimeter-gram-second) unit of energy, equal to one ten-millionth of a joule.
Use this calculator to move between watt hours and ergs accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.