Convert Electronvolts to Kilojoules
Instantly convert Electronvolts (eV) to Kilojoules (kJ) with our free online calculator.
Formula: eV to kJ — multiply by 1.6022e-22
Reference Table
| Electronvolts (eV) | Kilojoules (kJ) |
|---|---|
| 1 | 1.602177e-22 |
| 5 | 8.010883e-22 |
| 10 | 1.602177e-21 |
| 25 | 4.005442e-21 |
| 50 | 8.010883e-21 |
| 100 | 1.602177e-20 |
How to Convert Electronvolts to Kilojoules
Formula
To convert Electronvolts (eV) to Kilojoules (kJ): multiply by 1.6022e-22
Step-by-Step
- Start with your value in Electronvolts (eV).
- Multiply by 1.6022e-22 to perform the conversion.
- The result is your value expressed in Kilojoules (kJ).
Conversion Factor
1 eV = 1.602177e-22 kJ
Reverse Factor
1 kJ = 6.241509e+21 eV
Worked Example
Convert 25 Electronvolts to Kilojoules: 25 eV = 4.005442e-21 kJ
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 Kilojoule (kJ)
A metric unit of energy equal to 1,000 joules. Kilojoules are the standard unit for food energy outside the United States — Australia, New Zealand, and the European Union all display kJ on nutrition panels. A Big Mac is roughly 2,220 kJ; an adult daily energy intake is typically 8,000–10,500 kJ. The kJ is also the natural engineering unit for mechanical work, battery capacity, and small-scale thermodynamic calculations.
Quick Facts
- 1 Electronvolt equals 1.602177e-22 Kilojoules
- 1 Kilojoule equals 6.241509e+21 Electronvolts
- Electronvolt is a unit of energy
- Kilojoule is a unit of energy
- This conversion is commonly used in nutrition, electrical billing, physics, and mechanical engineering
- The Kilojoule belongs to the metric system
Common Electronvolt to Kilojoule Conversions
| Electronvolts (eV) | Kilojoules (kJ) |
|---|---|
| 0.01 | 1.602177e-24 |
| 0.1 | 1.602177e-23 |
| 0.25 | 4.005442e-23 |
| 0.5 | 8.010883e-23 |
| 1 | 1.602177e-22 |
| 2 | 3.204353e-22 |
| 3 | 4.806530e-22 |
| 5 | 8.010883e-22 |
| 10 | 1.602177e-21 |
| 15 | 2.403265e-21 |
| 20 | 3.204353e-21 |
| 25 | 4.005442e-21 |
| 50 | 8.010883e-21 |
| 75 | 1.201632e-20 |
| 100 | 1.602177e-20 |
| 250 | 4.005442e-20 |
| 500 | 8.010883e-20 |
| 1000 | 1.602177e-19 |
| 5000 | 8.010883e-19 |
| 10000 | 1.602177e-18 |
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 Kilojoules
The Kilojoule (symbol: kJ) is a unit of energy. A metric unit of energy equal to 1,000 joules. Kilojoules are the standard unit for food energy outside the United States — Australia, New Zealand, and the European Union all display kJ on nutrition panels. A Big Mac is roughly 2,220 kJ; an adult daily energy intake is typically 8,000–10,500 kJ. The kJ is also the natural engineering unit for mechanical work, battery capacity, and small-scale thermodynamic calculations.
It belongs to the metric measurement system.
Kilojoules are commonly used in nutrition, electrical billing, physics, and mechanical engineering.
Why Convert Electronvolts to Kilojoules?
Converting energy between Electronvolts and Kilojoules 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 Kilojoules?
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 Kilojoules, multiply by 1.6022e-22. For example, 25 eV equals 4.005442e-21 kJ.
How many Kilojoules are in 1 Electronvolt?
There are 1.602177e-22 Kilojoules in 1 Electronvolt.
How many Electronvolts are in 1 Kilojoule?
There are 6.241509e+21 Electronvolts in 1 Kilojoule.
What is the formula for Electronvolt to Kilojoule conversion?
The formula is: multiply by 1.6022e-22. This means 1 eV = 1.602177e-22 kJ.
Is a Electronvolt bigger than a Kilojoule?
Yes. One Electronvolt is larger than one Kilojoule because 1 eV equals 1.602177e-22 kJ, which is less than 1.
When do you need to convert between Electronvolts and Kilojoules?
A metric unit of energy equal to 1,000 joules. Electronvolt and Kilojoule 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.