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 Calories
Convert Electronvolt (eV) to Calorie (cal) instantly with an exact formula, conversion table, and FAQ.
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Convert electronvolts (eV) to calories (cal) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A (small) calorie is a thermochemical unit of heat energy equal to 4.184 joules, historically the energy needed to raise 1 gram of water by 1°C.
cal = eV × 3.829294058e-20
Results update instantly for Electronvolts to Calories conversions.
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Formula
cal = eV × 3.829294058e-20
eV = cal × 2.611447397e+19
Conversion table
| 1 eV | 3.829294e-20 cal |
| 5 eV | 1.914647e-19 cal |
| 10 eV | 3.829294e-19 cal |
| 20 eV | 7.658588e-19 cal |
| 50 eV | 1.914647e-18 cal |
| 100 eV | 3.829294e-18 cal |
| 500 eV | 1.914647e-17 cal |
| 1000 eV | 3.829294e-17 cal |
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How the formula works
Both electronvolt and calorie measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in electronvolts by 3.829294058e-20 to get calories. To reverse the conversion, multiply a calorie value by 2.611447397e+19 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 Calorie (cal)?
A (small) calorie is a thermochemical unit of heat energy equal to 4.184 joules, historically the energy needed to raise 1 gram of water by 1°C.
How do I convert electronvolts to calories?
Multiply the electronvolt value by 3.829294058e-20 to get the equivalent in calories. For example, 5 eV × 3.829294058e-20 = 1.914647e-19 cal.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 3.829294058e-20 is an exact, non-rounded value.
Can I convert calories back to electronvolts?
Yes. Divide the calorie value by 3.829294058e-20, or multiply it by 2.611447397e+19, to get electronvolts.
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About converting electronvolts to calories
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 (small) calorie is a thermochemical unit of heat energy equal to 4.184 joules, historically the energy needed to raise 1 gram of water by 1°C.
Use this calculator to move between electronvolts and calories accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.