eV to kJ Converter

How to convert electronvolts to kilojoules

FormulakJ = eV × 1.602176634×10⁻²²

Multiply the value in electronvolts by 1.602176634×10⁻²². To go the other way, multiply by 6.241509074×10²¹ (or divide by 1.602176634×10⁻²²).

An electronvolt is smaller than a kilojoule: it takes 6.241509074×10²¹ electronvolts to make one kilojoule.

Worked examples

1 electronvolt1 eV × 1.602176634×10⁻²² = 1.602176634×10⁻²² kJ
5 electronvolts5 eV × 1.602176634×10⁻²² = 8.01088317×10⁻²² kJ
10 electronvolts10 eV × 1.602176634×10⁻²² = 1.602176634×10⁻²¹ kJ
20 electronvolts20 eV × 1.602176634×10⁻²² = 3.204353268×10⁻²¹ kJ
100 electronvolts100 eV × 1.602176634×10⁻²² = 1.602176634×10⁻²⁰ kJ

Electronvolts to kilojoules conversion table

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

Electronvolts to kilojoules: 0.1–10 eV
Electronvolts (eV)	Kilojoules (kJ)
0.1 eV	1.6021766×10⁻²³ kJ
0.25 eV	4.0054416×10⁻²³ kJ
0.5 eV	8.0108832×10⁻²³ kJ
1 eV	1.6021766×10⁻²² kJ
2 eV	3.2043533×10⁻²² kJ
3 eV	4.8065299×10⁻²² kJ
4 eV	6.4087065×10⁻²² kJ
5 eV	8.0108832×10⁻²² kJ
6 eV	9.6130598×10⁻²² kJ
7 eV	1.1215236×10⁻²¹ kJ
8 eV	1.2817413×10⁻²¹ kJ
9 eV	1.441959×10⁻²¹ kJ
10 eV	1.6021766×10⁻²¹ kJ

Electronvolts to kilojoules: 12–1,000 eV
Electronvolts (eV)	Kilojoules (kJ)
12 eV	1.922612×10⁻²¹ kJ
15 eV	2.403265×10⁻²¹ kJ
20 eV	3.2043533×10⁻²¹ kJ
25 eV	4.0054416×10⁻²¹ kJ
30 eV	4.8065299×10⁻²¹ kJ
40 eV	6.4087065×10⁻²¹ kJ
50 eV	8.0108832×10⁻²¹ kJ
75 eV	1.2016325×10⁻²⁰ kJ
100 eV	1.6021766×10⁻²⁰ kJ
250 eV	4.0054416×10⁻²⁰ kJ
500 eV	8.0108832×10⁻²⁰ kJ
1,000 eV	1.6021766×10⁻¹⁹ kJ

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).

Kilojoule (kJ)

One thousand joules. Food labels in Australia and the EU list energy in kJ alongside kcal. One kilojoule equals 1,000 joules (J).

Frequently asked questions

How many kilojoules are in one electronvolt?

There are 1.602176634×10⁻²² kilojoules in one electronvolt, and this value is exact by definition.

How do I convert electronvolts to kilojoules?

Multiply the number of electronvolts by 1.602176634×10⁻²². For example, 10 eV × 1.602176634×10⁻²² = 1.602176634×10⁻²¹ kJ.

How many electronvolts are in one kilojoule?

One kilojoule equals 6.241509074×10²¹ electronvolts. That is the reverse factor, 1 ÷ 1.602176634×10⁻²².

What is 10 electronvolts in kilojoules?

10 eV = 1.602176634×10⁻²¹ kJ.

Is this eV to kJ 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.