Electronvolts to Joules Converter
Convert electronvolts (eV) to joules (J) instantly. Energy conversions link food labels in kJ and kcal, SP Group bills in kWh and air-conditioner capacity in BTU.
Result
- Joules
- 1.602177e-19 J
How to use the electronvolts to joules converter
- Enter the electronvolts (eV).
- The results update as you type, or press Calculate.
- Read the joules first, then the supporting figures below it.
Formula
Joules = electronvolts × 1.602177e-19
Worked example
For example, with these inputs:
- Electronvolts (eV): 1
the calculator returns:
- Joules: 1.602177e-19 J
Electronvolts to Joules table
| Electronvolts | Joules |
|---|---|
| 1 eV | 1.602177e-19 J |
| 2 eV | 3.204353e-19 J |
| 5 eV | 8.010883e-19 J |
| 10 eV | 1.602177e-18 J |
| 20 eV | 3.204353e-18 J |
| 25 eV | 4.005442e-18 J |
| 50 eV | 8.010883e-18 J |
| 100 eV | 1.602177e-17 J |
| 250 eV | 4.005442e-17 J |
| 500 eV | 8.010883e-17 J |
| 1,000 eV | 1.602177e-16 J |
About this conversion
Energy conversions link food labels in kJ and kcal, SP Group bills in kWh and air-conditioner capacity in BTU.
For everyday use, three or four significant figures are usually enough. Engineering, science and trade documents may need more, and rounding should happen only at the end of a calculation.
Many conversion factors are exact by definition. The inch has been defined as exactly 2.54 centimetres since 1959, and the pound as exactly 0.45359237 kilograms, so conversions involving them can be as precise as you need.
Frequently asked questions
How many joules are in one electronvolt?
1 eV = 1.602177e-19 J.
How do I convert eV to J?
Joules = electronvolts × 1.602177e-19.