Joule to Electronvolt Converter
Convert Joules to Electronvolts
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How to Convert Joules to Electronvolts
To convert joules to electronvolts (eV), divide the number of joules by 1.60218 x 10-19. This is because 1 electronvolt is the amount of kinetic energy gained by a single electron accelerating from rest through an electric potential difference of one volt in a vacuum.
Formula
Electronvolts = Joules ÷ (1.60218 × 10-19)
or
eV = J ÷ (1.60218 × 10-19)
Step-by-step process
- Take the measurement in joules
- Divide that number by 1.60218e-19
- The result is the equivalent energy in electronvolts
Examples
- 1e-18 joules = 1e-18 ÷ 1.60218e-19 = 6.24 eV
- 5e-18 joules = 5e-18 ÷ 1.60218e-19 = 31.2 eV
- 1e-17 joules = 1e-17 ÷ 1.60218e-19 = 62.4 eV
Common Joules to Electronvolts Conversions
Here is a table of common conversions for quick reference:
| Joules (J) | Electronvolts (eV) | Joules (J) | Electronvolts (eV) |
|---|---|---|---|
| 1e-21 | 0.00624 | 1e-18 | 6,241.5 |
| 1e-20 | 0.0624 | 1e-17 | 62,415 |
| 1e-19 | 0.624 | 1e-16 | 624,150 |
| 1.602e-19 | 1 | 1e-15 | 6,241,500 |
Other conversions from joules
Joules can be converted to various other units of energy. Here are some common conversions:
Frequently Asked Questions
How many joules are in an electronvolt?
There are approximately 1.60218 x 10-19 joules in one electronvolt.