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Conversions

Electronvolts to Joules

Convert electronvolts to joules instantly with accurate unit factors. Free online Electronvolts to Joules — instant, accurate results, no signup needed.

Derivation

  1. ├── 01Given1 electronvolt
  2. ├── 02Formulaenergy = value × (factor_from / factor_to)
  3. ├── 03Substitute1 × (1.6022e-19 / 1)
  4. ├── 04Simplify1 × 1.6022e-19
  5. └── 05Result1.6022e-19 joule
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§01What is

Understanding the Electronvolts to Joules

This tool converts values from electronvolts to joules. Convert electronvolts to joules instantly with accurate unit factors. Whether you’re working with scientific data, engineering specs, or everyday measurements, it gives you the exact answer instantly.

Quick calculators for the math that shouldn’t need a notepad — instant, accurate, private to your browser. The Electronvolts to Joules sits in that toolkit — it convert electronvolts to joules instantly with accurate unit factors. Enter your numbers above and the result updates instantly; every step of the math is shown in the Derivation panel so you can see exactly how the answer was reached.

§02The Formula

How it’s calculated

1 electronvolt = 1.60218e-19 joules → value_in_joule = value_in_electronvolt × 1.60218e-19

Where

value_in_electronvolt
The number of electronvolts you start with (the value you enter above)
value_in_joule
The equivalent number of joules (the result)
factor
The exact conversion ratio — 1.60218e-19 — anchored to SI definitions, not rounded
§03Practical Example

Step-by-step walkthrough

Scenario

Convert 5 electronvolts to joules.

  1. 01Look up the SI factors: 1 electronvolt = 1.602176634e-19 base units, 1 joule = 1 base units.
  2. 02Divide to get the conversion ratio: 1.602176634e-19 / 1 = 1.60218e-19.
  3. 03Multiply by the quantity: 5 × 1.60218e-19 = 8.01088e-19.
  4. 04So 5 electronvolts = 8.01088e-19 joules.
§04Variants

Common Electronvolts to Joules Problems

The formula gets rearranged depending on which variable you need. Here are the patterns you’ll run into in the real world — find the one that matches your problem and follow the worked steps.

01 · PATTERN

1 electronvolt

joules = electronvolts × 1.60218e-19

Convert 1 electronvolt to joules.

  1. 01Start with 1 electronvolt.
  2. 02Multiply by the conversion ratio 1.60218e-19.
  3. 03Result: 1 electronvolt = 1.60218e-19 joules.
02 · PATTERN

10 electronvolts

joules = electronvolts × 1.60218e-19

Convert 10 electronvolts to joules.

  1. 01Start with 10 electronvolts.
  2. 02Multiply by the conversion ratio 1.60218e-19.
  3. 03Result: 10 electronvolts = 1.60218e-18 joules.
03 · PATTERN

100 electronvolts

joules = electronvolts × 1.60218e-19

Convert 100 electronvolts to joules.

  1. 01Start with 100 electronvolts.
  2. 02Multiply by the conversion ratio 1.60218e-19.
  3. 03Result: 100 electronvolts = 1.60218e-17 joules.
§05FAQ

Frequently asked questions

No — 1 electronvolt is smaller, it equals only 1.60218e-19 joules.
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