J to eV
Convert Joule to Electronvolt
Convert Joule to Electronvolt instantly with the tool above. The conversion factor is 6.241509e+18, meaning 1 joule equals 6.241509e+18 electronvolts. Type any value and the result updates immediately — no ads, no page reloads, no clutter.
Type a number above. The result updates instantly — no buttons, no reloads.
1 Joule = 6.241509e+18 electronvolts
1 Electronvolt = 1.602177e-19 joules
Quick reference
Common joules converted to electronvolts at a glance.
| J | eV |
|---|---|
| 1 | 6.241509e+18 |
| 2 | 1.248302e+19 |
| 5 | 3.120755e+19 |
| 10 | 6.241509e+19 |
| 25 | 1.560377e+20 |
| 50 | 3.120755e+20 |
| 100 | 6.241509e+20 |
| 500 | 3.120755e+21 |
| 1,000 | 6.241509e+21 |
How to convert joules to electronvolts
To convert a value from joules to electronvolts, multiply the joule value by 6.241509e+18 electronvolts. For example, 10 joules × that factor = 6.241509e+19 electronvolts.
This joule to electronvolt converter runs entirely in your browser, so results appear instantly with no page reload, no advertisements and no sign-up.
Frequently asked questions
How many electronvolts are in 1 joule?+
1 joule is equal to 6.241509e+18 electronvolts.
How do you convert joules to electronvolts?+
To convert joules to electronvolts, multiply the joule value by 6.241509e+18. For example, 10 joules × 6.241509e+18 = 6.241509e+19 electronvolts.
What is the formula to convert joules to electronvolts?+
Joule → Electronvolt: value × 6.241509e+18. Equivalently, 1 joule = 6.241509e+18 electronvolts.
Is this Joule to Electronvolt converter free to use?+
Yes. This joule to electronvolt converter is completely free, works instantly in your browser, and contains no advertisements, popups or sign-up.