Joules to Electronvolts (J to eV)
Free online joule to electronvolt converter. Type a value, get an instant exact result — plus the formula, a ready-made conversion table, and reverse conversion.
ENERGY CONVERTER — INSTANT RESULT
Formula: multiply the joule value by 6.24151e+18 — i.e. eV = J × 6.24151e+18
Quick check: 1 J = 6.24151e+18 eV
Quick check: 1 J = 6.24151e+18 eV
Joules to Electronvolts conversion table
| Joules (J) | Electronvolts (eV) |
|---|---|
| 1 J | 6.24151e+18 eV |
| 2 J | 1.2483e+19 eV |
| 3 J | 1.87245e+19 eV |
| 4 J | 2.4966e+19 eV |
| 5 J | 3.12075e+19 eV |
| 6 J | 3.74491e+19 eV |
| 7 J | 4.36906e+19 eV |
| 8 J | 4.99321e+19 eV |
| 9 J | 5.61736e+19 eV |
| 10 J | 6.24151e+19 eV |
| 15 J | 9.36226e+19 eV |
| 20 J | 1.2483e+20 eV |
| 25 J | 1.56038e+20 eV |
| 30 J | 1.87245e+20 eV |
| 40 J | 2.4966e+20 eV |
| 50 J | 3.12075e+20 eV |
| 75 J | 4.68113e+20 eV |
| 100 J | 6.24151e+20 eV |
| 250 J | 1.56038e+21 eV |
| 500 J | 3.12075e+21 eV |
| 1,000 J | 6.24151e+21 eV |
How to convert joules to electronvolts
To convert joules to electronvolts, multiply the amount in joules by 6.24151e+18. For example, 10 J = 6.24151e+19 eV. To convert in the other direction, divide by the same factor, or use the ⇄ swap button above.
Convert between joules, calories, BTU, kilowatt-hours and foot-pounds. The joule is the SI unit of energy; the thermochemical calorie is defined as exactly 4.184 J.
Frequently asked questions
How many electronvolts are in one joule?
One joule is exactly 6.24151e+18 electronvolts.
How do I convert J to eV?
Multiply the J value by 6.24151e+18 to get eV. The converter at the top of this page does this automatically and works in both directions.
How much is 100 joules in electronvolts?
100 joules equals 6.24151e+20 electronvolts.