joules to electronvolts
Convert joule to electronvolt — instant, free, with the formula shown.
1 J=6.2415e+18 eV
How to convert joule to electronvolt
To convert joule to electronvolt, multiply by 6.2415e+18:
eV = J × 6.2415e+18
For example, 10 J × 6.2415e+18 = 6.2415e+19 eV.
J to eV conversion table
| joules (J) | electronvolts (eV) |
|---|---|
| 1 J | 6.2415e+18 eV |
| 2 J | 1.2483e+19 eV |
| 5 J | 3.1208e+19 eV |
| 10 J | 6.2415e+19 eV |
| 25 J | 1.5604e+20 eV |
| 50 J | 3.1208e+20 eV |
| 100 J | 6.2415e+20 eV |
| 250 J | 1.5604e+21 eV |
| 500 J | 3.1208e+21 eV |
| 1000 J | 6.2415e+21 eV |
Other joule conversions
Convert to electronvolt from another unit
J to eV — frequently asked
How many electronvolts are in 1 joule?
1 joule = 6.2415e+18 electronvolts (J × 6.2415e+18 = eV).
What is the formula to convert joule to electronvolt?
Multiply your joule value by 6.2415e+18 to get electronvolt.
How do I convert 10 joules to electronvolts?
10 J = 6.2415e+19 eV. For 100 J the answer is 6.2415e+20 eV. Use the calculator on this page for any other value.
When to convert joule to electronvolt
1Electricity bills (kWh)
2Nutrition labels (kcal / food cal)
3HVAC and heating (BTU, therms)
4Physics and chemistry (J, eV)
Energy conversion — common questions
Is a food calorie the same as a calorie?
No — a food 'Calorie' (capital C) actually means 1 kilocalorie = 1,000 small calories = 4,184 J. Nutrition labels typically write 'cal' meaning kcal.
How many joules in 1 kWh?
1 kWh = 3,600,000 J (3.6 MJ). Because 1 kW × 1 hour = 1,000 W × 3,600 s = 3,600,000 J.
What is a BTU?
British Thermal Unit — the energy required to raise 1 pound of water by 1 °F. 1 BTU ≈ 1,055 J.
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