Convert joules to electronvolts
1 J = 6241509074460000000 eV — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.
More converter tools
Readable results
Ranges, ± tolerances, feet/inches and clock durations work in the value field.
Unit picker
Export this result
Show this value in all 39 energy & work units
- Petajoules PJ 1e-15
- Terajoules TJ 1e-12
- Gigajoules GJ 1e-9
- Megajoules MJ 0.000 001
- Kilojoules kJ 0.001
- Joules J 1
- Millijoules mJ 1000
- Microjoules µJ 1 000 000
- Nanojoules nJ 1 000 000 000
- Watt-hours Wh 0.000 277 777 777 778
- Kilowatt-hours kWh 0.000 000 277 777 777 778
- Megawatt-hours MWh 2.77777777778e-10
- Gigawatt-hours GWh 2.77777777778e-13
- Terawatt-hours TWh 2.77777777778e-16
- Calorie (thermochemical)s cal 0.239 005 736 138
- Kilocalories kcal 0.000 239 005 736 138
- Calorie (IT)s cal (IT) 0.238 845 896 627
- Kilocalorie (IT)s kcal (IT) 0.000 238 845 896 627
- British thermal units BTU 0.000 947 817 120 313
- BTU (thermochemical)s BTU (th) 0.000 948 451 652 677
- Million BTUs MMBTU 9.47817120313e-10
- Therm (US)s thm 9.48043427973e-9
- Therm (EC)s thm (EC) 9.47816987913e-9
- Electronvolts eV 6.24150907446e+18
- Kiloelectronvolts keV 6 241 509 074 460 000
- Megaelectronvolts MeV 6 241 509 074 460
- Gigaelectronvolts GeV 6 241 509 074.46
- Teraelectronvolts TeV 6 241 509.074 46
- Ergs erg 10 000 000
- Foot-pounds ft·lbf 0.737 562 149 277
- Inch-pounds in·lbf 8.850 745 791 33
- Foot-poundals ft·pdl 23.730 360 404 2
- Horsepower-hours hp·h 0.000 000 372 506 135 999
- Tonne of TNTs t TNT 2.39005736138e-10
- Kiloton of TNTs kt TNT 2.39005736138e-13
- Megaton of TNTs Mt TNT 2.39005736138e-16
- Hartrees Eₕ 2.2937122784e+17
- Rydbergs Ry 4.58742455679e+17
- Quads quad 9.47817120313e-19
Every row is Joule (J) converted through the joule, in exact rational arithmetic.
How to convert joules to electronvolts
Multiply the number of joules by 6241509074460000000 to get electronvolts.
Electronvolt: Exactly 1.602 176 634 × 10⁻¹⁹ J since the 2019 SI redefinition.
Joule to Electronvolt conversion table
| Joules (J) | Electronvolts (eV) |
|---|---|
| 1 J | 6.2415091e+18 |
| 2 J | 1.2483018e+19 |
| 3 J | 1.8724527e+19 |
| 5 J | 3.1207545e+19 |
| 10 J | 6.2415091e+19 |
| 20 J | 1.2483018e+20 |
| 25 J | 1.5603773e+20 |
| 50 J | 3.1207545e+20 |
| 100 J | 6.2415091e+20 |
| 250 J | 1.5603773e+21 |
| 500 J | 3.1207545e+21 |
| 1000 J | 6.2415091e+21 |
Electronvolt to Joule conversion table
| Electronvolts (eV) | Joules (J) |
|---|---|
| 1 eV | 1.6021766e-19 |
| 2 eV | 3.2043533e-19 |
| 3 eV | 4.8065299e-19 |
| 5 eV | 8.0108832e-19 |
| 10 eV | 1.6021766e-18 |
| 20 eV | 3.2043533e-18 |
| 25 eV | 4.0054416e-18 |
| 50 eV | 8.0108832e-18 |
| 100 eV | 1.6021766e-17 |
| 250 eV | 4.0054416e-17 |
| 500 eV | 8.0108832e-17 |
| 1000 eV | 1.6021766e-16 |
Frequently asked
How many electronvolts are in a joule?
One joule equals 6.241509074e+18 electronvolts (J → eV). That figure is exact, not rounded.
How do you convert joules to electronvolts?
Multiply the number of joules by 6241509074460000000 to get electronvolts.
What is 1 eV in joules?
One electronvolt is 1.602176634e-19 joules.
What is 10 J in eV?
10 J = 6.2415091e+19 eV.
What exactly is a electronvolt?
Exactly 1.602 176 634 × 10⁻¹⁹ J since the 2019 SI redefinition.