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Energy

Convert electronvolts to joules

1 eV=1.6022e-19J

Use the converter below to change any electronvolts value into joules instantly — with formula, conversion table, and real-world examples.

1.6022e-19

Conversion formula

Forward
joules = electronvolts × 1.6022e-19
Reverse
electronvolts = joules × 6.2415e18

Example: 10 eV × 1.6022e-19 = 1.6022e-18 J.

About both units

From

Electronvolt

eV

The electronvolt equals 1.602 × 10⁻¹⁹ joules — the energy gained by an electron accelerated through 1 volt. It is the natural energy unit of atomic, nuclear and particle physics. Chemical bonds are a few eV; LHC protons reach 7 TeV = 7 × 10¹² eV.

Real-world: Silicon band gap: 1.12 eV. Hydrogen ionization: 13.6 eV. LHC proton: 7 TeV. Photon wavelength 500 nm = 2.5 eV.
Read full electronvolt reference →
To

Joule

J

The joule is the SI unit of energy, work and heat. Defined as one newton-metre or one watt-second. Named after James Prescott Joule who demonstrated the mechanical equivalent of heat. Lifting a 100 g apple 1 metre requires about 1 J.

Real-world: Lifting a 100 g apple 1 m: ≈ 1 J. 100 kcal snack: 418,400 J. Hand grenade: ~650 kJ.
Read full joule reference →

Electronvolt to Joule conversion table

Common electronvolts to joules values for quick reference.

Electronvolt (eV)Joule (J)
1 eV1.6022e-19 J
10 eV1.6022e-18 J
100 eV1.6022e-17 J
500 eV8.0109e-17 J
1,000 eV1.6022e-16 J
5,000 eV8.0109e-16 J
10,000 eV1.6022e-15 J
50,000 eV8.0109e-15 J
100,000 eV1.6022e-14 J
500,000 eV8.0109e-14 J

Tips & common mistakes

Quick tips

  • 1 eV ≈ 1.602 × 10⁻¹⁹ J.
  • Particle physics scales: eV → keV → MeV → GeV → TeV (1000× each).
  • Photon energy (eV) × wavelength (nm) ≈ 1240.

Avoid these

  • Confusing eV with V (volt) — eV is energy, V is electric potential.
  • Mixing scales: treating MeV as twice eV — it's a million times larger.
  • Using eV for macroscopic energy — unwieldy numbers.

Frequently asked questions

How many joules in a electronvolt?
One electronvolt equals 1.6022e-19 joules.
How do I convert electronvolts to joules?
Multiply the electronvolt value by 1.6022e-19 to get the equivalent in joules.
What is 100 electronvolts in joules?
100 electronvolts equals 1.6022e-17 joules.
Is a electronvolt bigger than a joule?
No. 1 electronvolt equals 1.6022e-19 joules, so one electronvolt is smaller.
How to convert electronvolts to joules without a calculator?
Multiply by 0 for a quick estimate; use a calculator for precise results.

Related energy conversions

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More from Electronvolt

eV → kJ
1 = 1.6022e-22 kJ
eV → MJ
1 = 1.6022e-25 MJ
eV → kWh
1 = 4.4505e-26 kWh
eV → Wh
1 = 4.4505e-23 Wh
eV → cal
1 = 3.8293e-20 cal
eV → kcal
1 = 3.8293e-23 kcal
eV → BTU
1 = 1.5186e-22 BTU
eV → thm
1 = 1.5186e-27 thm

More to Joule

kJ → J
1 = 1,000 J
MJ → J
1 = 1,000,000 J
kWh → J
1 = 3,600,000 J
Wh → J
1 = 3,600 J
cal → J
1 = 4.184 J
kcal → J
1 = 4,184 J
BTU → J
1 = 1,055.06 J
thm → J
1 = 105,505,585.3 J

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