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Energy conversion

Joules to electron-volts conversion

Convert joules (J) to electron-volts (eV). Exact: 1 eV = 1.602176634×10⁻¹⁹ J. Switch J → eV or eV → J. Runs locally in your browser. Try it free.

Instant result
Result
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Enter values to convert.

Inputs —
Mode —
Formula —

Formulas

Core equations used by this converter.

J → eVeV = J ÷ (1.602176634×10⁻¹⁹)
Exact definition1 eV = (1.602176634×10⁻¹⁹) J
eV → JJ = eV × (1.602176634×10⁻¹⁹)
iUses the exact definition 1 eV = (1.602176634×10⁻¹⁹) J. Displayed results may be rounded.

How to use

1

Choose J → eV or eV → J

Use the tabs to switch direction. Forward mode needs joules; reverse uses the opposite unit.

2

Enter the value

Type a non-negative value in the active unit field.

3

Convert and read the result

Use Convert or let the result update automatically.

Example conversions

Common values with formula and result.

ϟ

1.602176634×10⁻¹⁹ J to eV

1.602176634×10⁻¹⁹ J to eV

→ 1 eV
1 eV
ϟ

1 J to eV

1 J to eV

1 ÷ (1.602176634×10⁻¹⁹) ≈ 6.241509e+18 eV
1 ÷ (1.602176634×10⁻¹⁹) ≈ 6.241509e+18 eV
ϟ

1.602176634×10⁻¹³ J to eV

1.602176634×10⁻¹³ J to eV

→ 1×10⁶ eV = 1 MeV
1×10⁶ eV = 1 MeV
ϟ

Reverse: 1 eV → J

Reverse: 1 eV → J

1.602176634×10⁻¹⁹ J
1.602176634×10⁻¹⁹ J

Joules to electron-volts conversion specification

Version 1.1.1 · Engine tested

Calculation status
  • Engine tested 4 published cases
  • Named expert review Not performed
  • Calculation version 1.1.1

Review policy

Definition
Joules (J) converts to eV using a fixed linear factor. Convert joules (J) to electron-volts (eV). Exact: 1 eV = 1.602176634×10⁻¹⁹ J. Formula and chart.
What it calculates
Value between J and eV. Switch direction with the converter tabs.
Inputs
  • Joules (J) or reverse unit (eV)
Outputs
  • Converted value in eV or J
Formula
eV = J ÷ (1.602176634×10⁻¹⁹) · 1 eV = (1.602176634×10⁻¹⁹) J
Joules to electron-volts conversion table
Joules (J)eV
1.602176634×10⁻¹⁹ J1 eV
1.602176634×10⁻¹⁶ J1 keV
1.602176634×10⁻¹³ J1 MeV
1.602176634×10⁻¹⁰ J1 GeV
1 J≈ 6.2415e+18 eV
Assumptions
  • Conversion runs locally in the browser; values are not uploaded.
  • Uses the standard factor/definition for these units.
Units
  • J → eV
  • eV → J
Boundary conditions
  • Empty or non-numeric input yields no valid result.
  • Non-negative values are expected for physical quantities.
Example
1 J → approximately 6.241509074×10¹⁸ eV
Validation cases
  • 1 J → ≈ 6.241509074×10¹⁸ eV
  • 10 J → ≈ 6.241509074×10¹⁹ eV
  • 50 J → ≈ 3.120754537×10²⁰ eV
  • 100 J → ≈ 6.241509074×10²⁰ eV
Sources
  • SI / international unit definitions where applicable
  • CalculatorX conversion factors (local runtime)
Calculation version
1.1.1

Background

Interpretation and common distinctions.

Use the converter tabs to switch direction when available. Results for Joules to electron-volts conversion update locally in your browser.

elec Electron-volts to joules › joul Joules to kilojoules › ev eV to keV ›

Frequently asked questions

Key distinctions behind the conversion.

How do you convert using Joules to electron-volts conversion?

Divide joules by the exact energy of one electronvolt. Example: 1.602176634×10⁻¹⁹ J to eV → 1 eV.

Can I switch direction?

Use the converter tabs when available, or open the related reverse tool from Related.

Does this run online or locally?

Calculation runs locally in your browser. Values are not uploaded.

How precise are the results?

Results follow the formulas on this page. Round to the precision your use case needs.