Kilocalorie to Electronvolt Converter
Energy · unit-converter
Convert Kilocalorie to Electronvolt with fixed input and output units, a step-by-step formula line, and reference tables. Factors are joule-based; food energy uses thermochemical calories. The full Energy Converter also includes MMBtu, toe, thermal kWh, and MeV/GeV.
Calculator
From: Kilocalorie (kcal)
To: Electronvolt (ev)
About Kilocalorie
The kilocalorie (kcal) is 1,000 calories in the nutrition sense—often labeled “Calorie” on food packaging. Here 1 kcal = 4,184 J (thermochemical calorie definition used in this tool).
About Electronvolt
The electronvolt is the energy change of one elementary charge across 1 V: 1 eV ≈ 1.602176634×10⁻¹⁹ J (exact by SI definition). Used in particle physics and chemistry.
How to convert kilocalories to electronvolts
1 kilocalorie is equal to 2.61144740e+22 electronvolt when both are expressed in joule-equivalents:
1 kcal = (4,184 J ÷ 1.602176634e-19 J) ev = 2.61144740e+22 ev
Each kilocalorie is defined as 4,184 J and each electronvolt as 1.602176634e-19 J in this tool, so one kcal equals 4,184 ÷ 1.602176634e-19 ev = 2.61144740e+22 ev.
Let d(kcal) be the numeric amount in Kilocalorie (kcal), and d(ev) the amount in Electronvolt (ev). Then:
d(ev) = d(kcal) × (4,184 / 1.602176634e-19)
Equivalently, divide by how many kcal fit into one ev (joules per ev divided by joules per kcal):
d(ev) = d(kcal) ÷ 3.82929406e-23
Or: electronvolt = kilocalorie ÷ 3.82929406e-23
Examples
Example #1: Convert 1 kcal to electronvolt
1 kcal = 1 kcal × (4,184/1.602176634e-19) ev = 2.61144739675e+22 ev
1 kcal = 1 kcal ÷ 3.82929406e-23 = 2.61144739675e+22 ev
Example #2: Convert 10 kcal to electronvolt
10 kcal = 10 kcal × (4,184/1.602176634e-19) ev = 2.61144739675e+23 ev
10 kcal = 10 kcal ÷ 3.82929406e-23 = 2.61144739675e+23 ev
Summary
To convert Kilocalorie to Electronvolt, multiply the value in kcal by the ratio of joules per kcal divided by joules per ev. Equivalently: value_ev = value_kcal × (4184 / 1.602176634e-19). Numerically, 1 kcal equals 2.6114473967543833e+22 ev.
Relationship context
You are converting between food / nutrition energy (calories) (Kilocalories) and atomic-scale energy (electronvolts) (Electronvolts). All values are mapped through joules first. The numeric factor is 2.611447e+22.
Conversion tables
| Kilocalorie (kcal) | Electronvolt (ev) |
|---|---|
| 0.1 | 2.61144739675e+21 |
| 1 | 2.61144739675e+22 |
| 2 | 5.22289479351e+22 |
| 3 | 7.83434219026e+22 |
| 4 | 1.0445789587e+23 |
| 5 | 1.30572369838e+23 |
| 6 | 1.56686843805e+23 |
| 7 | 1.82801317773e+23 |
| 8 | 2.0891579174e+23 |
| 9 | 2.35030265708e+23 |
| Kilocalorie (kcal) | Electronvolt (ev) |
|---|---|
| 10 | 2.61144739675e+23 |
| 20 | 5.22289479351e+23 |
| 30 | 7.83434219026e+23 |
| 40 | 1.0445789587e+24 |
| 50 | 1.30572369838e+24 |
| 60 | 1.56686843805e+24 |
| 70 | 1.82801317773e+24 |
| 80 | 2.0891579174e+24 |
| 90 | 2.35030265708e+24 |
| 100 | 2.61144739675e+24 |