To convert electronvolts to calories, multiply by 3.829294058e-20.
The calculation uses 1 eV = 3.829294058e-20 cal. Results are displayed to at most 10 significant digits. Definitions can be exact while a displayed decimal is rounded. Match the displayed precision to your original measurement.
Uses the thermochemical calorie, 4.184 J.
The formula
value in cal = value in eV × 3.829294058e-20
eV- Input unit: electronvolts
cal- Output unit: calories
How to use this calculator
- Enter a value in eV.
- Multiply by the stored conversion factor.
- Read the result in cal; divide by the same factor to convert back.
Worked examples
Worked conversion
1 eV × 3.829294058e-20 ≈ 3.829294058e-20 cal.
Reverse conversion
3.829294058e-20 cal ÷ 3.829294058e-20 ≈ 1 eV. Rounding intermediate values can change the last displayed digit.
Frequently asked questions
What factor does this converter use?
It uses 3.829294058e-20 cal per eV. Uses the thermochemical calorie, 4.184 J.
Why can another converter show a slightly different answer?
Check the unit convention first (such as US versus Imperial or decimal versus binary), then compare rounding. Measurement uncertainty is separate from the unit conversion.
eV to cal table
| eV | cal (rounded) |
|---|---|
| 0 | 0 |
| 1 | 3.829294058e-20 |
| 2 | 7.658588117e-20 |
| 5 | 1.914647029e-19 |
| 10 | 3.829294058e-19 |
| 100 | 3.829294058e-18 |
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