ConverterReverse conversion: J to eV

eV to J Converter - Electron Volt to Joule

Electron Volt (eV) to Joule (J)

Direct answer

1 eV = 1.60217663e-19 J

J = eV × 1.60217663e-19

Converter

Input

Result

1.60217663e-19J

J to eV

Conversion formula

J = eV × 1.60217663e-19

eV = J × 6.24150907e+18

Example: 10 eV = 10 × 1.60217663e-19 = 1.60217663e-18 J.

Common conversion table

eV	J
1 eV	1.60217663e-19 J
2 eV	3.20435327e-19 J
5 eV	8.01088317e-19 J
10 eV	1.60217663e-18 J
20 eV	3.20435327e-18 J
50 eV	8.01088317e-18 J
100 eV	1.60217663e-17 J
1,000 eV	1.60217663e-16 J

Conversion derivation

Express both eV and J in the same base unit J (joule), then cancel the shared base unit.

1
Rewrite eV in the base unit
$1 eV = 1.60217663 \times 1 0^{- 19} J$
2
Rewrite J in the base unit
$1 J = 1 J$
3
Forward conversion
$1 eV = \frac{1.60217663 \times 1 0 ^{- 19} J}{1 J} \times 1 J = \frac{1.60217663 \times 1 0 ^{- 19}}{1} J = 1.60217663 \times 1 0^{- 19} J$
4
Reverse conversion
$1 J = \frac{1 J}{1.60217663 \times 1 0 ^{- 19} J} \times 1 eV = \frac{1}{1.60217663 \times 1 0 ^{- 19}} eV = 6.24150907 \times 1 0^{18} eV$

AI explanation for this conversion

This pre-generated explanation is schema-checked. Numeric results still come from the page formula and calculator.

Pre-generated

Explanation: Electron Volt (eV) to Joule (J)

This conversion factor holds because the electron volt is defined as the amount of kinetic energy gained by a single electron accelerating through an electric potential difference of one volt. The joule is the SI unit of energy, equal to one watt-second.

Definition

An electron volt (eV) is a unit of energy. The joule (J) is the standard SI unit of energy. The conversion factor is the defined value of one electron volt in joules.

Principle

The conversion uses the defined relationship that 1 eV equals the elementary charge of an electron multiplied by one volt. This product is a fixed constant in energy units.

Assumptions

The elementary charge is a defined constant.
The volt is the SI derived unit of electric potential.

Cautions

The conversion factor is a defined value, not a measured one.
Ensure the precision of your calculation matches the required significant figures.

FAQ

How many J are in 1 eV?

1 eV = 1.60217663e-19 J.

How many J are in 10 eV?

10 eV = 1.60217663e-18 J.

How many J are in 100 eV?

100 eV = 1.60217663e-17 J.

What is the formula to convert eV to J?

Use J = eV × 1.60217663e-19.

How many eV are in 1 J?

1 J = 6.24150907e+18 eV.

What should I check when converting eV to J?

Use the conversion factor and round the result to the precision required by your calculation.

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