Electronvolt to Joule Converter
Energy · unit-converter
Convert Electronvolt to Joule 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: Electronvolt (ev)
To: Joule (j)
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.
About Joule
The joule is the SI unit of energy. All other units here are converted through fixed joule equivalents.
How to convert electronvolts to joules
1 electronvolt is equal to 1.60217663e-19 joule when both are expressed in joule-equivalents:
1 ev = (1.602176634e-19 J ÷ 1 J) j = 1.60217663e-19 j
1 eV = 1.602176634×10⁻¹⁹ J by the SI definition of the elementary charge.
Each electronvolt is defined as 1.602176634e-19 J and each joule as 1 J in this tool, so one ev equals 1.602176634e-19 ÷ 1 j = 1.60217663e-19 j.
Let d(ev) be the numeric amount in Electronvolt (ev), and d(j) the amount in Joule (j). Then:
d(j) = d(ev) × (1.602176634e-19 / 1)
Equivalently, divide by how many ev fit into one j (joules per j divided by joules per ev):
d(j) = d(ev) ÷ 6.24150907e+18
Or: joule = electronvolt ÷ 6.24150907e+18
Examples
Example #1: Convert 1 ev to joule
1 ev = 1 ev × (1.602176634e-19/1) j = 0 j
1 ev = 1 ev ÷ 6.24150907e+18 = 0 j
Example #2: Convert 10 ev to joule
10 ev = 10 ev × (1.602176634e-19/1) j = 0 j
10 ev = 10 ev ÷ 6.24150907e+18 = 0 j
Summary
To convert Electronvolt to Joule, multiply the value in ev by the ratio of joules per ev divided by joules per j. Equivalently: value_j = value_ev × (1.602176634e-19 / 1). Numerically, 1 ev equals 1.602176634e-19 j.
Relationship context
You are converting between atomic-scale energy (electronvolts) (Electronvolts) and SI energy (joules) (Joules). All values are mapped through joules first. The numeric factor is 1.602177e-19.
Conversion tables
| Electronvolt (ev) | Joule (j) |
|---|---|
| 0.1 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 0 |
| 8 | 0 |
| 9 | 0 |
| Electronvolt (ev) | Joule (j) |
|---|---|
| 10 | 0 |
| 20 | 0 |
| 30 | 0 |
| 40 | 0 |
| 50 | 0 |
| 60 | 0 |
| 70 | 0 |
| 80 | 0 |
| 90 | 0 |
| 100 | 0 |