Volt to Electron Volt Calculator
Convert electrical voltage to energy in electron volts using elementary charge or coulombs
Calculate Energy in Electron Volts
Elementary Charge Method
Use number of elementary charges (e)
Formula: eV = V × e
Coulombs Method
Use charge in coulombs (C)
Formula: eV = V × C / (1.602 × 10⁻¹⁹)
Electrical potential difference
Number of elementary charges (discrete count)
Energy Results
Formula used: eV = 0 V × 0 e = 0.000e+0 eV
Energy classification: Sub-eV - Very low energy photons/particles
Example Calculations
Example 1: Single Electron in 1.5V Battery
Voltage: 1.5 V
Charge: 1 elementary charge
Calculation: eV = 1.5 V × 1 e = 1.5 eV
Result: 1.5 electron volts (chemical bond energy range)
Example 2: High Voltage Circuit
Voltage: 15 V
Charge: 5 coulombs
Calculation: eV = 15 V × 5 C ÷ (1.602 × 10⁻¹⁹)
Result: ≈ 4.68 × 10²⁰ eV (extremely high energy)
Example 3: X-ray Tube
Voltage: 50,000 V (50 kV)
Charge: 1 elementary charge
Calculation: eV = 50,000 V × 1 e = 50,000 eV = 50 keV
Result: 50 keV (medical X-ray energy range)
Energy Scale Reference
Important Constants
eV Unit Prefixes
Understanding Volt to Electron Volt Conversion
What is an Electron Volt?
An electron volt (eV) is a unit of energy equal to the kinetic energy gained or lost by an electron when it moves through a potential difference of one volt. It's commonly used in atomic, nuclear, and particle physics because it represents energies at the atomic scale.
Key Concepts
- •Voltage (V): Electric potential difference measured in volts
- •Elementary charge (e): The fundamental unit of electric charge
- •Energy: The ability to do work, measured in joules or electron volts
Conversion Methods
Method 1: Elementary Charge
Where e is the number of elementary charges. This method is used when dealing with discrete charge carriers like electrons or protons.
Method 2: Coulombs
Where C is the charge in coulombs. This method converts any charge amount to electron volts using the elementary charge constant.
Applications in Physics
Atomic Physics
- • Ionization energies (5-25 eV typical)
- • Chemical bond energies (1-10 eV)
- • Photon energies in spectroscopy
Particle Physics
- • Accelerator beam energies (GeV-TeV)
- • Particle rest masses (MeV/c²)
- • Cosmic ray energies (up to 10²⁰ eV)