Electronvolt Converter - Convert eV, keV, MeV, GeV & More Units
Result:
1 eV = 1.602177e-19 J
What is an Electronvolt?
An electronvolt (eV) is a unit of energy. It measures how much energy an electron gets when it moves through an electric field. Scientists use electronvolts to measure very small amounts of energy in atoms and particles.
The electronvolt converter helps you change between different energy units like eV, keV, MeV, and GeV. This tool makes it easy to convert energy values for science, physics, and engineering work.
Key Facts:
- 1 eV = 1.602 Ć 10ā»Ā¹ā¹ joules
- 1 keV = 1,000 eV (kilo = thousand)
- 1 MeV = 1,000,000 eV (mega = million)
- 1 GeV = 1,000,000,000 eV (giga = billion)
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How Electronvolt Conversion Works
Input Value
Enter energy value
Select Units
Choose from and to units
Convert
Apply conversion formula
Electronvolt Formulas
eV to Joules
J = eV Ć 1.602176634Ć10ā»Ā¹ā¹
Example: 1 eV = 1.602Ć10ā»Ā¹ā¹ J
keV to eV
eV = keV Ć 1000
Example: 5 keV = 5 Ć 1000 = 5000 eV
MeV to keV
keV = MeV Ć 1000
Example: 2 MeV = 2 Ć 1000 = 2000 keV
GeV to MeV
MeV = GeV Ć 1000
Example: 1.5 GeV = 1.5 Ć 1000 = 1500 MeV
Electronvolt Conversion Table
| eV | keV | MeV | GeV | TeV | Joules |
|---|---|---|---|---|---|
| 1e+0 | 1.00e-3 | 1.00e-6 | 1.00e-9 | 1.00e-12 | 1.60e-19 |
| 1e+1 | 1.00e-2 | 1.00e-5 | 1.00e-8 | 1.00e-11 | 1.60e-18 |
| 1e+2 | 1.00e-1 | 1.00e-4 | 1.00e-7 | 1.00e-10 | 1.60e-17 |
| 1e+3 | 1.00e+0 | 1.00e-3 | 1.00e-6 | 1.00e-9 | 1.60e-16 |
| 1e+4 | 1.00e+1 | 1.00e-2 | 1.00e-5 | 1.00e-8 | 1.60e-15 |
| 1e+5 | 1.00e+2 | 1.00e-1 | 1.00e-4 | 1.00e-7 | 1.60e-14 |
| 1e+6 | 1.00e+3 | 1.00e+0 | 1.00e-3 | 1.00e-6 | 1.60e-13 |
| 1e+7 | 1.00e+4 | 1.00e+1 | 1.00e-2 | 1.00e-5 | 1.60e-12 |
| 1e+8 | 1.00e+5 | 1.00e+2 | 1.00e-1 | 1.00e-4 | 1.60e-11 |
| 1e+9 | 1.00e+6 | 1.00e+3 | 1.00e+0 | 1.00e-3 | 1.60e-10 |
| 1e+10 | 1.00e+7 | 1.00e+4 | 1.00e+1 | 1.00e-2 | 1.60e-9 |
| 1e+11 | 1.00e+8 | 1.00e+5 | 1.00e+2 | 1.00e-1 | 1.60e-8 |
| 1e+12 | 1.00e+9 | 1.00e+6 | 1.00e+3 | 1.00e+0 | 1.60e-7 |
| 1e+13 | 1.00e+10 | 1.00e+7 | 1.00e+4 | 1.00e+1 | 1.60e-6 |
| 1e+14 | 1.00e+11 | 1.00e+8 | 1.00e+5 | 1.00e+2 | 1.60e-5 |
Energy Units Progression Chart
1 eV
1 keV
1 MeV
1 GeV
1 TeV
10 TeV
Practice Problems
Problem 1:
Convert 5 keV to eV
Solution: 5 Ć 1000 = 5000 eV
Problem 2:
Convert 2.5 MeV to keV
Solution: 2.5 Ć 1000 = 2500 keV
Problem 3:
Convert 1 eV to joules
Solution: 1 Ć 1.602Ć10ā»Ā¹ā¹ = 1.602Ć10ā»Ā¹ā¹ J
Problem 4:
Convert 0.5 GeV to MeV
Solution: 0.5 Ć 1000 = 500 MeV
Problem 5:
Convert 10 TeV to GeV
Solution: 10 Ć 1000 = 10,000 GeV
Common Examples of Electronvolt Energy
Everyday Energy (eV)
- ā¢ Visible light: 1.5 - 3.5 eV
- ā¢ LED lights: 1.8 - 3.1 eV
- ā¢ Chemical bonds: 1 - 10 eV
- ā¢ Solar cell energy: 1.1 - 1.4 eV
Medical Energy (keV)
- ā¢ Dental X-rays: 60 - 70 keV
- ā¢ Chest X-rays: 100 - 120 keV
- ā¢ CT scans: 80 - 140 keV
- ā¢ Mammography: 15 - 30 keV
Nuclear Energy (MeV)
- ā¢ Alpha particles: 4 - 7 MeV
- ā¢ Beta particles: 0.1 - 10 MeV
- ā¢ Gamma rays: 0.1 - 10 MeV
- ā¢ Nuclear reactions: 1 - 200 MeV
Particle Physics (GeV)
- ā¢ Proton mass: 0.938 GeV
- ā¢ Neutron mass: 0.940 GeV
- ā¢ Particle accelerators: 1 - 1000 GeV
- ā¢ Cosmic rays: 1 - 100 GeV
How to Use the Electronvolt Converter
Step-by-Step Guide:
- 1. Enter your energy value in the input box
- 2. Choose the unit you want to convert from (eV, keV, MeV, etc.)
- 3. Select the unit you want to convert to
- 4. See the result instantly displayed
- 5. Use the conversion table for quick reference
Tips for Better Results:
- ā¢ Use scientific notation for very large numbers
- ā¢ Check your units before converting
- ā¢ Use the conversion table to verify results
- ā¢ Practice with the example problems
- ā¢ Save or print results for later use
Frequently Asked Questions
What is the difference between eV and joules?
An electronvolt (eV) is a very small unit of energy used in atomic physics. One eV equals 1.602 Ć 10ā»Ā¹ā¹ joules. Joules are the standard unit of energy, but eV is more convenient for measuring tiny energy amounts in atoms and particles.
How do I convert keV to eV?
To convert keV to eV, multiply by 1,000. For example: 5 keV = 5 Ć 1,000 = 5,000 eV. The prefix "kilo" means thousand, so 1 keV equals 1,000 eV.
What does MeV mean in particle physics?
MeV stands for megaelectronvolt, which equals one million electronvolts. Particle physicists use MeV to measure the energy of particles in nuclear reactions and radioactive decay. For example, alpha particles typically have energies of 4-7 MeV.
Why do we use GeV in particle accelerators?
GeV (gigaelectronvolt) equals one billion electronvolts. Particle accelerators create very high-energy particles, so GeV is a convenient unit. The Large Hadron Collider, for example, accelerates protons to energies of several thousand GeV (TeV range).
How accurate is this electronvolt converter?
Our electronvolt converter uses the exact conversion factor defined by NIST: 1 eV = 1.602176634 Ć 10ā»Ā¹ā¹ joules. The calculator provides results with high precision, suitable for scientific and engineering calculations.
Can I convert electronvolts to other energy units?
Yes! This converter supports eV, keV, MeV, GeV, TeV, and joules. You can convert between any of these units instantly. The tool also shows conversion formulas and provides a detailed conversion table for reference.