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Electronvolts to Joules Converter

Convert electronvolts to joules and joules to eV instantly. Bidirectional energy converter with formula and common values.

eV

Joules

0.801

J

5000000000000000000 eV = 0.801 J

J = eV × 1.602e-19

Electronvolts to Joules: 1 eV equals 1.60200e-19 J. To convert electronvolts to joules, multiply by 1.60200e-19 (J = eV × 1.602e-19). For example, 10 eV = 1.60200e-18 J.

How to Convert Electronvolts to Joules

To convert from electronvolts to joules, multiply the value by 1.60200e-19. The conversion is linear, meaning doubling the input doubles the output.

Conversion Formula

  • Electronvolts to Joules: J = eV × 1.602e-19
  • Joules to Electronvolts: eV = J ÷ 1.602e-19

Electronvolts to Joules Conversion Chart

Electronvolts (eV)Joules (J)
0.11.60200e-20
0.254.00500e-20
0.58.01000e-20
11.60200e-19
23.20400e-19
34.80600e-19
58.01000e-19
101.60200e-18
203.20400e-18
254.00500e-18
508.01000e-18
1001.60200e-17
2504.00500e-17
10001.60200e-16

Understanding the Units

What is an Electronvolt?

An electronvolt equals approximately 1.602 × 10⁻¹⁹ joules — the kinetic energy gained by a single electron accelerated through a one-volt potential difference.

Common contexts: particle physics, atomic spectroscopy, semiconductor band gaps.

What is a Joule?

The joule is the SI derived unit of energy, equal to the work done by a force of one newton acting through a distance of one meter (1 J = 1 N·m = 1 W·s).

Named after James Prescott Joule (1818–1889), the English physicist who demonstrated the mechanical equivalent of heat.

Common contexts: physics, chemistry, engineering.

Real-World Reference Points

Item Electronvolts (eV) Joules (J)
Energy to lift an apple 1 m6.242e+181
Heart beat (resting)6.242e+181
AA battery (alkaline)5.618e+229000

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FAQ

How many joules are in one electronvolt?

One electronvolt equals approximately 1.602 × 10^-19 joules. This is an extremely small amount of energy, appropriate for atomic-scale processes.

How do I convert eV to joules?

Multiply the eV value by 1.602 × 10^-19. For example, 13.6 eV × 1.602 × 10^-19 = 2.179 × 10^-18 J (the hydrogen ionization energy).

What are common energies measured in eV?

Visible light photons carry 1.8-3.1 eV. Chemical bond energies range from 1-10 eV. X-rays are in the keV range. Nuclear reactions involve MeV energies.

What is the relationship between eV and voltage?

One eV is the kinetic energy gained by an electron accelerated through a 1-volt potential. The charge of an electron (1.602 × 10^-19 coulombs) times 1 volt gives the energy in joules.

How many joules are in 1 electronvolt?

1 eV equals 1.60200e-19 J.

How do you convert electronvolts to joules?

Multiply the electronvolt value by 1.60200e-19. Formula: J = eV × 1.602e-19.

How many joules are in 5 electronvolts?

5 eV = 8.01000e-19 J.

How do you convert joules back to electronvolts?

Use the inverse formula: eV = J ÷ 1.602e-19. For example, 1 J = 6.24220e+18 eV.

What is the difference between Electronvolt and Joul?

An electronvolt equals approximately 1.602 × 10⁻¹⁹ joules — the kinetic energy gained by a single electron accelerated through a one-volt potential difference. The joule is the SI derived unit of energy, equal to the work done by a force of one newton acting through a distance of one meter (1 J = 1 N·m = 1 W·s).