eV to MJ Converter

How to convert electronvolts to megajoules

FormulaMJ = eV × 1.602176634×10⁻²⁵

Multiply the value in electronvolts by 1.602176634×10⁻²⁵. To go the other way, multiply by 6.241509074×10²⁴ (or divide by 1.602176634×10⁻²⁵).

An electronvolt is smaller than a megajoule: it takes 6.241509074×10²⁴ electronvolts to make one megajoule.

Worked examples

1 electronvolt1 eV × 1.602176634×10⁻²⁵ = 1.602176634×10⁻²⁵ MJ
5 electronvolts5 eV × 1.602176634×10⁻²⁵ = 8.01088317×10⁻²⁵ MJ
10 electronvolts10 eV × 1.602176634×10⁻²⁵ = 1.602176634×10⁻²⁴ MJ
20 electronvolts20 eV × 1.602176634×10⁻²⁵ = 3.204353268×10⁻²⁴ MJ
100 electronvolts100 eV × 1.602176634×10⁻²⁵ = 1.602176634×10⁻²³ MJ

Electronvolts to megajoules conversion table

Values are calculated by the conversion engine and rounded to 8 significant figures.

Electronvolts to megajoules: 0.1–10 eV
Electronvolts (eV)	Megajoules (MJ)
0.1 eV	1.6021766×10⁻²⁶ MJ
0.25 eV	4.0054416×10⁻²⁶ MJ
0.5 eV	8.0108832×10⁻²⁶ MJ
1 eV	1.6021766×10⁻²⁵ MJ
2 eV	3.2043533×10⁻²⁵ MJ
3 eV	4.8065299×10⁻²⁵ MJ
4 eV	6.4087065×10⁻²⁵ MJ
5 eV	8.0108832×10⁻²⁵ MJ
6 eV	9.6130598×10⁻²⁵ MJ
7 eV	1.1215236×10⁻²⁴ MJ
8 eV	1.2817413×10⁻²⁴ MJ
9 eV	1.441959×10⁻²⁴ MJ
10 eV	1.6021766×10⁻²⁴ MJ

Electronvolts to megajoules: 12–1,000 eV
Electronvolts (eV)	Megajoules (MJ)
12 eV	1.922612×10⁻²⁴ MJ
15 eV	2.403265×10⁻²⁴ MJ
20 eV	3.2043533×10⁻²⁴ MJ
25 eV	4.0054416×10⁻²⁴ MJ
30 eV	4.8065299×10⁻²⁴ MJ
40 eV	6.4087065×10⁻²⁴ MJ
50 eV	8.0108832×10⁻²⁴ MJ
75 eV	1.2016325×10⁻²³ MJ
100 eV	1.6021766×10⁻²³ MJ
250 eV	4.0054416×10⁻²³ MJ
500 eV	8.0108832×10⁻²³ MJ
1,000 eV	1.6021766×10⁻²² MJ

About the units

Electronvolt (eV)

The energy an electron gains across one volt: exactly 1.602176634 × 10⁻¹⁹ J. One electronvolt equals 1.602176634×10⁻¹⁹ joules (J).

Megajoule (MJ)

The megajoule (MJ) is a unit of energy in the International System of Units (SI). One megajoule equals 1,000,000 joules (J).

Frequently asked questions

How many megajoules are in one electronvolt?

There are 1.602176634×10⁻²⁵ megajoules in one electronvolt, and this value is exact by definition.

How do I convert electronvolts to megajoules?

Multiply the number of electronvolts by 1.602176634×10⁻²⁵. For example, 10 eV × 1.602176634×10⁻²⁵ = 1.602176634×10⁻²⁴ MJ.

How many electronvolts are in one megajoule?

One megajoule equals 6.241509074×10²⁴ electronvolts. That is the reverse factor, 1 ÷ 1.602176634×10⁻²⁵.

What is 10 electronvolts in megajoules?

10 eV = 1.602176634×10⁻²⁴ MJ.

Is this eV to MJ converter accurate?

Yes. Both units are defined exactly in terms of SI units, so the conversion factor is exact; results are shown to 12 significant figures by default and you can change precision in the converter. Calculations run in your browser using the same tested engine that generated this page.