UnitConvConvert
Energy

Convert electronvolts to megajoules

1 eV=1.6022e-25MJ

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

1.6022e-25

Conversion formula

Forward
megajoules = electronvolts × 1.6022e-25
Reverse
electronvolts = megajoules × 6.2415e24

Example: 10 eV × 1.6022e-25 = 1.6022e-24 MJ.

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

Megajoule

MJ

The megajoule equals 1,000,000 joules. Used for fuel energy content, large-scale mechanical work and in some European natural-gas billing. A litre of petrol contains about 34 MJ of energy.

Real-world: 1 L petrol: ~34 MJ. 1 L diesel: ~38 MJ. Tesla Model 3 full charge: ~270 MJ.
Read full megajoule reference →

Electronvolt to Megajoule conversion table

Common electronvolts to megajoules values for quick reference.

Electronvolt (eV)Megajoule (MJ)
1 eV1.6022e-25 MJ
10 eV1.6022e-24 MJ
100 eV1.6022e-23 MJ
500 eV8.0109e-23 MJ
1,000 eV1.6022e-22 MJ
5,000 eV8.0109e-22 MJ
10,000 eV1.6022e-21 MJ
50,000 eV8.0109e-21 MJ
100,000 eV1.6022e-20 MJ
500,000 eV8.0109e-20 MJ

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 megajoules in a electronvolt?
One electronvolt equals 1.6022e-25 megajoules.
How do I convert electronvolts to megajoules?
Multiply the electronvolt value by 1.6022e-25 to get the equivalent in megajoules.
What is 100 electronvolts in megajoules?
100 electronvolts equals 1.6022e-23 megajoules.
Is a electronvolt bigger than a megajoule?
No. 1 electronvolt equals 1.6022e-25 megajoules, so one electronvolt is smaller.
How to convert electronvolts to megajoules without a calculator?
Multiply by 0 for a quick estimate; use a calculator for precise results.

Related energy conversions

📊 See full comparison matrix →

More from Electronvolt

eV → J
1 = 1.6022e-19 J
eV → kJ
1 = 1.6022e-22 kJ
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 Megajoule

J → MJ
1 = 1.0000e-6 MJ
kJ → MJ
1 = 0.001 MJ
kWh → MJ
1 = 3.6 MJ
Wh → MJ
1 = 0.0036 MJ
cal → MJ
1 = 4.1840e-6 MJ
kcal → MJ
1 = 0.004184 MJ
BTU → MJ
1 = 0.001055 MJ
thm → MJ
1 = 105.506 MJ

Conversions in other categories

WeightKilogram → PoundLengthKilometer → MileTemperatureCelsius → FahrenheitVolumeLiter → US GallonAreaSquare Meter → Square FootSpeedKilometer per Hour → Mile per HourPressureBar → Pound per Square InchPowerKilowatt → Mechanical Horsepower