Convert electronvolts to calories

1 eV=3.8293e-20cal

Use the converter below to change any electronvolts value into calories instantly — with formula, conversion table, and real-world examples.

You have

Equals

3.8293e-20

Conversion formula

Forward

calories = electronvolts × 3.8293e-20

Reverse

electronvolts = calories × 2.6114e19

Example: 10 eV × 3.8293e-20 = 3.8293e-19 cal.

About both units

From

Electronvolt

The electronvolt equals 1.602 × 10⁻¹⁹ joules — the energy gained by an electron accelerated through 1 volt. It is the natural energy unit of atomic, nuclear and particle physics. Chemical bonds are a few eV; LHC protons reach 7 TeV = 7 × 10¹² eV.

Real-world: Silicon band gap: 1.12 eV. Hydrogen ionization: 13.6 eV. LHC proton: 7 TeV. Photon wavelength 500 nm = 2.5 eV.

Read full electronvolt reference →

Calorie

cal

The gram calorie (small calorie) equals 4.184 joules — the energy to raise 1 g of water by 1 °C. It is a scientific unit, distinct from the nutrition "Calorie" (kcal). Largely replaced by joules in modern science.

Real-world: Raising 1 g of water 1 °C: 1 cal. A 100 kcal snack = 100,000 small calories.

Read full calorie reference →

Electronvolt to Calorie conversion table

Common electronvolts to calories values for quick reference.

Electronvolt (eV)	Calorie (cal)
1 eV	3.8293e-20 cal
10 eV	3.8293e-19 cal
100 eV	3.8293e-18 cal
500 eV	1.9146e-17 cal
1,000 eV	3.8293e-17 cal
5,000 eV	1.9146e-16 cal
10,000 eV	3.8293e-16 cal
50,000 eV	1.9146e-15 cal
100,000 eV	3.8293e-15 cal
500,000 eV	1.9146e-14 cal

Tips & common mistakes

Quick tips

1 eV ≈ 1.602 × 10⁻¹⁹ J.
Particle physics scales: eV → keV → MeV → GeV → TeV (1000× each).
Photon energy (eV) × wavelength (nm) ≈ 1240.

Avoid these

Confusing eV with V (volt) — eV is energy, V is electric potential.
Mixing scales: treating MeV as twice eV — it's a million times larger.
Using eV for macroscopic energy — unwieldy numbers.

Frequently asked questions

How many calories in a electronvolt?

One electronvolt equals 3.8293e-20 calories.

How do I convert electronvolts to calories?

Multiply the electronvolt value by 3.8293e-20 to get the equivalent in calories.

What is 100 electronvolts in calories?

100 electronvolts equals 3.8293e-18 calories.

Is a electronvolt bigger than a calorie?

No. 1 electronvolt equals 3.8293e-20 calories, so one electronvolt is smaller.

How to convert electronvolts to calories without a calculator?

Multiply by 0 for a quick estimate; use a calculator for precise results.

Related energy conversions

📊 See full comparison matrix →

Conversions in other categories

WeightKilogram → Pound LengthKilometer → Mile TemperatureCelsius → Fahrenheit VolumeLiter → US Gallon AreaSquare Meter → Square Foot SpeedKilometer per Hour → Mile per Hour PressureBar → Pound per Square Inch PowerKilowatt → Mechanical Horsepower