Physics

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Volts to Electron-Volts Converter.

For one elementary charge, convert a potential difference in volts to electron-volts.

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01

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Results update as you type.

Electron-volts: 5 eV

Electron-volts

0.000000eV
Energy: 0 J

Energy

0.000000J

Results update automatically as you type.

Use Cases

Physics homework and exam prep

Quickly convert potential differences to energy units for single-charge problems, such as electron acceleration in electric fields.

Example: Convert 12 V to eV for an electron.

Semiconductor and particle physics

Convert voltage readings to energy values when analyzing energy levels or particle energies in eV.

Example: A potential of 3.5 V corresponds to 3.5 eV.

Frequently Asked Questions

How do you convert volts to electron-volts?
For a single elementary charge, 1 electron-volt equals 1 volt times the elementary charge (e). So the energy in eV is numerically equal to the potential difference in volts. Enter volts, and the calculator gives the equivalent energy in eV.
What is the relationship between volts and electron-volts?
A volt is a unit of electric potential difference, while an electron-volt is a unit of energy. For one elementary charge, 1 eV is the energy gained when moving across a potential difference of 1 volt. Thus, 1 V corresponds to 1 eV for a single charge.
Can I use this calculator for multiple charges?
No, this calculator is specifically for one elementary charge. For multiple charges, multiply the result by the number of charges. For example, 2 charges across 5 V would be 10 eV.

Tips & Common Mistakes

Tips

  • Remember that for one elementary charge, the numerical value in volts equals the numerical value in electron-volts.
  • If you have a different charge, multiply the result by the charge in units of elementary charge (e).
  • Use this calculator for quick conversions in physics problems, but for multiple charges, adjust accordingly.

Common Mistakes to Avoid

  • Assuming the conversion factor is not 1:1 for a single charge – it is exactly 1 eV per volt.
  • Forgetting that this calculator is only for one elementary charge, not for arbitrary charge amounts.
  • Confusing volts (potential difference) with electron-volts (energy) – they are different units but numerically equal for a single charge.

Last updated: August 13, 2026