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Joules to electronvolts

1 joule in electronvolts
1 J = 6.2415091 × 10^18 eV
eV = J × 6.241509074 × 10^18

To convert joules to electronvolts, multiply by 6.241509074 × 10^18. The table below gives the values people look up most often, and the converter works for any number.

Joules to electronvolts table

Common joule values converted to electronvolts.
Joules Electronvolts
1 J 6.2415091 × 10^18
2 J 1.2483018 × 10^19
3 J 1.8724527 × 10^19
4 J 2.4966036 × 10^19
5 J 3.1207545 × 10^19
10 J 6.2415091 × 10^19
15 J 9.3622636 × 10^19
20 J 1.2483018 × 10^20
25 J 1.5603773 × 10^20
30 J 1.8724527 × 10^20
40 J 2.4966036 × 10^20
50 J 3.1207545 × 10^20
75 J 4.6811318 × 10^20
100 J 6.2415091 × 10^20
250 J 1.5603773 × 10^21
500 J 3.1207545 × 10^21
1,000 J 6.2415091 × 10^21

How the conversion works

The relationship is eV = J × 6.241509074 × 10^18. Both units measure energy, so the conversion is a fixed factor that never changes.

Common questions

How many electronvolts are in one joule?
One joule equals 6.2415091 × 10^18 electronvolts. eV = J × 6.241509074 × 10^18.
How do you convert joules to electronvolts?
Use eV = J × 6.241509074 × 10^18. So 10 J is 6.2415091 × 10^19 eV.
How many joules are in one electronvolt?
One electronvolt equals 1.602 × 10^-19 joules, which is the reverse of the conversion above.

Related pages

Sources

  1. Guide for the Use of the International System of Units (SP 811) — NIST (Public domain (US Government))
  2. The International System of Units (SI Brochure) — Bureau International des Poids et Mesures
  3. Calculated on this page — At One Place

How these figures are compiled and checked