kJ to eV Converter

How to convert kilojoules to electronvolts

FormulaeV = kJ × 6.241509074×10²¹

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

A kilojoule is larger than an electronvolt: one kilojoule contains 6.241509074×10²¹ electronvolts.

Worked examples

1 kilojoule1 kJ × 6.241509074×10²¹ = 6.241509074×10²¹ eV
5 kilojoules5 kJ × 6.241509074×10²¹ = 3.120754537×10²² eV
10 kilojoules10 kJ × 6.241509074×10²¹ = 6.241509074×10²² eV
20 kilojoules20 kJ × 6.241509074×10²¹ = 1.248301815×10²³ eV
100 kilojoules100 kJ × 6.241509074×10²¹ = 6.241509074×10²³ eV

Kilojoules to electronvolts conversion table

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

Kilojoules to electronvolts: 0.1–10 kJ
Kilojoules (kJ)	Electronvolts (eV)
0.1 kJ	6.2415091×10²⁰ eV
0.25 kJ	1.5603773×10²¹ eV
0.5 kJ	3.1207545×10²¹ eV
1 kJ	6.2415091×10²¹ eV
2 kJ	1.2483018×10²² eV
3 kJ	1.8724527×10²² eV
4 kJ	2.4966036×10²² eV
5 kJ	3.1207545×10²² eV
6 kJ	3.7449054×10²² eV
7 kJ	4.3690564×10²² eV
8 kJ	4.9932073×10²² eV
9 kJ	5.6173582×10²² eV
10 kJ	6.2415091×10²² eV

Kilojoules to electronvolts: 12–1,000 kJ
Kilojoules (kJ)	Electronvolts (eV)
12 kJ	7.4898109×10²² eV
15 kJ	9.3622636×10²² eV
20 kJ	1.2483018×10²³ eV
25 kJ	1.5603773×10²³ eV
30 kJ	1.8724527×10²³ eV
40 kJ	2.4966036×10²³ eV
50 kJ	3.1207545×10²³ eV
75 kJ	4.6811318×10²³ eV
100 kJ	6.2415091×10²³ eV
250 kJ	1.5603773×10²⁴ eV
500 kJ	3.1207545×10²⁴ eV
1,000 kJ	6.2415091×10²⁴ eV

About the units

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).

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).

Frequently asked questions

How many electronvolts are in one kilojoule?

There are 6.241509074×10²¹ electronvolts in one kilojoule, and this value is exact by definition.

How do I convert kilojoules to electronvolts?

Multiply the number of kilojoules by 6.241509074×10²¹. For example, 10 kJ × 6.241509074×10²¹ = 6.241509074×10²² eV.

How many kilojoules are in one electronvolt?

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

What is 10 kilojoules in electronvolts?

10 kJ = 6.241509074×10²² eV.

Is this kJ to eV 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.