Convert Electronvolts to Joules
Instantly convert Electronvolts (eV) to Joules (J) with our free online calculator.
Formula: eV to J — multiply by 1.6022e-19
Reference Table
| Electronvolts (eV) | Joules (J) |
|---|---|
| 1 | 1.602177e-19 |
| 5 | 8.010883e-19 |
| 10 | 1.602177e-18 |
| 25 | 4.005442e-18 |
| 50 | 8.010883e-18 |
| 100 | 1.602177e-17 |
How to Convert Electronvolts to Joules
Formula
To convert Electronvolts (eV) to Joules (J): multiply by 1.6022e-19
Step-by-Step
- Start with your value in Electronvolts (eV).
- Multiply by 1.6022e-19 to perform the conversion.
- The result is your value expressed in Joules (J).
Conversion Factor
1 eV = 1.602177e-19 J
Reverse Factor
1 J = 6.241509e+18 eV
Worked Example
Convert 25 Electronvolts to Joules: 25 eV = 4.005442e-18 J
About Electronvolt (eV)
A unit of energy equal to the energy gained by an electron accelerating through a one-volt electric field (exactly 1.602176634 × 10⁻¹⁹ joules). The electronvolt is the working unit of atomic, molecular, and particle physics: chemical bonds are a few eV; X-rays carry keV (thousands of eV); nuclear reactions release MeV (millions); particle colliders operate at GeV-TeV (billions-trillions). Almost every modern particle-physics paper reports energies in eV.
About Joule (J)
The SI unit of energy, work, and heat, equal to one newton-meter (the energy transferred when a force of one newton acts over a distance of one meter). Named for physicist James Prescott Joule, whose 19th-century experiments established the mechanical equivalent of heat. Joules are the universal reference for energy in physics and engineering. An apple falling 1 meter releases about 1 J; a Calorie (food kcal) is 4,184 J; a AA battery stores about 15,000 J.
Quick Facts
- 1 Electronvolt equals 1.602177e-19 Joules
- 1 Joule equals 6.241509e+18 Electronvolts
- Electronvolt is a unit of energy
- Joule is a unit of energy
- This conversion is commonly used in nutrition, electrical billing, physics, and mechanical engineering
- The Joule belongs to the metric system
Common Electronvolt to Joule Conversions
| Electronvolts (eV) | Joules (J) |
|---|---|
| 0.01 | 1.602177e-21 |
| 0.1 | 1.602177e-20 |
| 0.25 | 4.005442e-20 |
| 0.5 | 8.010883e-20 |
| 1 | 1.602177e-19 |
| 2 | 3.204353e-19 |
| 3 | 4.806530e-19 |
| 5 | 8.010883e-19 |
| 10 | 1.602177e-18 |
| 15 | 2.403265e-18 |
| 20 | 3.204353e-18 |
| 25 | 4.005442e-18 |
| 50 | 8.010883e-18 |
| 75 | 1.201632e-17 |
| 100 | 1.602177e-17 |
| 250 | 4.005442e-17 |
| 500 | 8.010883e-17 |
| 1000 | 1.602177e-16 |
| 5000 | 8.010883e-16 |
| 10000 | 1.602177e-15 |
Understanding Electronvolts
The Electronvolt (symbol: eV) is a unit of energy. A unit of energy equal to the energy gained by an electron accelerating through a one-volt electric field (exactly 1.602176634 × 10⁻¹⁹ joules). The electronvolt is the working unit of atomic, molecular, and particle physics: chemical bonds are a few eV; X-rays carry keV (thousands of eV); nuclear reactions release MeV (millions); particle colliders operate at GeV-TeV (billions-trillions). Almost every modern particle-physics paper reports energies in eV.
Electronvolts are commonly used in nutrition, electrical billing, physics, and mechanical engineering.
Understanding Joules
The Joule (symbol: J) is a unit of energy. The SI unit of energy, work, and heat, equal to one newton-meter (the energy transferred when a force of one newton acts over a distance of one meter). Named for physicist James Prescott Joule, whose 19th-century experiments established the mechanical equivalent of heat. Joules are the universal reference for energy in physics and engineering. An apple falling 1 meter releases about 1 J; a Calorie (food kcal) is 4,184 J; a AA battery stores about 15,000 J.
It belongs to the metric measurement system.
Joules are commonly used in nutrition, electrical billing, physics, and mechanical engineering.
Why Convert Electronvolts to Joules?
Converting energy between Electronvolts and Joules is common in physics, nutrition, and engineering. Electricity bills use kilowatt-hours, food labels list calories or kilojoules, and mechanical engineers work with joules and BTUs. Reliable conversion helps professionals and consumers compare energy values across different contexts.
Frequently Asked Questions
How do I convert Electronvolts to Joules?
A unit of energy equal to the energy gained by an electron accelerating through a one-volt electric field (exactly 1. To convert Electronvolts to Joules, multiply by 1.6022e-19. For example, 25 eV equals 4.005442e-18 J.
How many Joules are in 1 Electronvolt?
There are 1.602177e-19 Joules in 1 Electronvolt.
How many Electronvolts are in 1 Joule?
There are 6.241509e+18 Electronvolts in 1 Joule.
What is the formula for Electronvolt to Joule conversion?
The formula is: multiply by 1.6022e-19. This means 1 eV = 1.602177e-19 J.
Is a Electronvolt bigger than a Joule?
Yes. One Electronvolt is larger than one Joule because 1 eV equals 1.602177e-19 J, which is less than 1.
When do you need to convert between Electronvolts and Joules?
The SI unit of energy, work, and heat, equal to one newton-meter (the energy transferred when a force of one newton acts over a distance of one meter). Electronvolt and Joule are both energy units, so conversion comes up whenever one source of information uses one unit and another uses the other — a classic cross-reference challenge in engineering, trade, travel, and everyday life.