Convert electronvolts to kilocalories

1 eV=3.8293e-23kcal

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

You have

Equals

3.8293e-23

Conversion formula

Forward

kilocalories = electronvolts × 3.8293e-23

Reverse

electronvolts = kilocalories × 2.6114e22

Example: 10 eV × 3.8293e-23 = 3.8293e-22 kcal.

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 →

Kilocalorie

kcal

The kilocalorie equals 1000 small calories or 4184 joules. This is the nutrition "Calorie" (capital C in some US labels). EU and UK labels always say kcal; US labels say Calories. Adult daily intake is about 2000 kcal.

Real-world: Adult daily intake: ~2000 kcal. Banana: 90 kcal. Big Mac: 550 kcal. 30 min running: ~300 kcal burned.

Read full kilocalorie reference →

Electronvolt to Kilocalorie conversion table

Common electronvolts to kilocalories values for quick reference.

Electronvolt (eV)	Kilocalorie (kcal)
1 eV	3.8293e-23 kcal
10 eV	3.8293e-22 kcal
100 eV	3.8293e-21 kcal
500 eV	1.9146e-20 kcal
1,000 eV	3.8293e-20 kcal
5,000 eV	1.9146e-19 kcal
10,000 eV	3.8293e-19 kcal
50,000 eV	1.9146e-18 kcal
100,000 eV	3.8293e-18 kcal
500,000 eV	1.9146e-17 kcal

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 kilocalories in a electronvolt?

One electronvolt equals 3.8293e-23 kilocalories.

How do I convert electronvolts to kilocalories?

Multiply the electronvolt value by 3.8293e-23 to get the equivalent in kilocalories.

What is 100 electronvolts in kilocalories?

100 electronvolts equals 3.8293e-21 kilocalories.

Is a electronvolt bigger than a kilocalorie?

No. 1 electronvolt equals 3.8293e-23 kilocalories, so one electronvolt is smaller.

How to convert electronvolts to kilocalories without a calculator?

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

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