An electronvolt (eV) is the energy gained by a single electron accelerating through a potential difference of one volt, widely used in atomic and particle physics.
Electronvolts to Watt hours
Convert Electronvolt (eV) to Watt-hour (Wh) instantly with an exact formula, conversion table, and FAQ.
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Convert electronvolts (eV) 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 = eV × 4.450490650e-23
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Formula
Wh = eV × 4.450490650e-23
eV = Wh × 2.246943267e+22
Conversion table
| 1 eV | 4.450491e-23 Wh |
| 5 eV | 2.225245e-22 Wh |
| 10 eV | 4.450491e-22 Wh |
| 20 eV | 8.900981e-22 Wh |
| 50 eV | 2.225245e-21 Wh |
| 100 eV | 4.450491e-21 Wh |
| 500 eV | 2.225245e-20 Wh |
| 1000 eV | 4.450491e-20 Wh |
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How the formula works
Both electronvolt and watt-hour measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in electronvolts by 4.450490650e-23 to get watt hours. To reverse the conversion, multiply a watt-hour value by 2.246943267e+22 to get back to electronvolts.
Frequently asked questions
What is Electronvolt (eV)?
An electronvolt (eV) is the energy gained by a single electron accelerating through a potential difference of one volt, widely used in atomic and particle physics.
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 electronvolts to watt hours?
Multiply the electronvolt value by 4.450490650e-23 to get the equivalent in watt hours. For example, 5 eV × 4.450490650e-23 = 2.225245e-22 Wh.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 4.450490650e-23 is an exact, non-rounded value.
Can I convert watt hours back to electronvolts?
Yes. Divide the watt-hour value by 4.450490650e-23, or multiply it by 2.246943267e+22, to get electronvolts.
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About converting electronvolts to watt hours
An electronvolt (eV) is the energy gained by a single electron accelerating through a potential difference of one volt, widely used in atomic and particle physics. 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 electronvolts 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.