electronvolts to joules
Convert electronvolt to joule — instant, free, with the formula shown.
1 eV=1.6022e-19 J
How to convert electronvolt to joule
To convert electronvolt to joule, multiply by 1.6022e-19:
J = eV × 1.6022e-19
For example, 10 eV × 1.6022e-19 = 1.6022e-18 J.
eV to J conversion table
| electronvolts (eV) | joules (J) |
|---|---|
| 1 eV | 1.6022e-19 J |
| 2 eV | 3.2044e-19 J |
| 5 eV | 8.0109e-19 J |
| 10 eV | 1.6022e-18 J |
| 25 eV | 4.0054e-18 J |
| 50 eV | 8.0109e-18 J |
| 100 eV | 1.6022e-17 J |
| 250 eV | 4.0054e-17 J |
| 500 eV | 8.0109e-17 J |
| 1000 eV | 1.6022e-16 J |
Other electronvolt conversions
Convert to joule from another unit
eV to J — frequently asked
How many joules are in 1 electronvolt?
1 electronvolt = 1.6022e-19 joules (eV × 1.6022e-19 = J).
What is the formula to convert electronvolt to joule?
Multiply your electronvolt value by 1.6022e-19 to get joule.
How do I convert 10 electronvolts to joules?
10 eV = 1.6022e-18 J. For 100 eV the answer is 1.6022e-17 J. Use the calculator on this page for any other value.
When to convert electronvolt to joule
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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