What is the Electronvolt Converter?
The electronvolt is the energy unit of the very small: the energy one electron gains crossing a one-volt battery. Particle physicists, chemists, and astronomers quote everything in eV because joules would be absurdly tiny — a single photon of visible light carries just a few eV. The conversion factor is one of nature's constants: 1 eV equals 1.602176634×10⁻¹⁹ joules, exact by definition since 2019. Type 13.6 into the Electronvolts (eV) box — the ionization energy of hydrogen, the most famous eV number in science — and the Joules (J) readout shows about 2.18×10⁻¹⁸, while the bonus boxes give 0.0136 keV, 0.0000136 MeV, and a whisper of GeV. The prefixes scale by thousands: keV for X-rays, MeV for nuclear reactions, GeV for particle colliders like the LHC. Chemistry students meet eV in ionization energies, solar engineers in band gaps. Whatever the realm, multiplying by 1.602176634×10⁻¹⁹ bridges the quantum and everyday worlds.
With the pre-filled defaults — Electronvolts (eV) 1,000,000 — the Electronvolt Converter returns Joules (J) 0.00000000000016021766, Kiloelectronvolts (keV) 1,000.0000, Megaelectronvolts (MeV) 1.0000, Gigaelectronvolts (GeV) 0.001000. Change any input and those results update instantly, so you can see exactly how each number you enter moves the answer.
How to Use the Electronvolt Converter
- 1Type the energy into the Electronvolts (eV) box — try 13.6 for hydrogen ionization.
- 2Read the Joules (J) result: 13.6 eV is about 2.18×10⁻¹⁸ J.
- 3Check the Kiloelectronvolts (keV) box: 13.6 eV is 0.0136 keV.
- 4Check the Megaelectronvolts (MeV) box: 13.6 eV is 0.0000136 MeV.
- 5Try 1000000 to see 1 MeV — the scale of nuclear reactions.
Formula
This is the core equation the Electronvolt Converter uses to calculate results. Enter values in the calculator above to see it in action.
See the full step-by-step formula guide with worked examples →
Common Examples
| Scenario | Calculation | Result |
|---|---|---|
| Example calculation | Electronvolts (eV) = 1,000,000 | Joules (J) = 0.00000000000016021766; Kiloelectronvolts (keV) = 1,000.0000; Megaelectronvolts (MeV) = 1.0000; Gigaelectronvolts (GeV) = 0.001000 |
Value Reference Table
See how the Joules (J) changes as Electronvolts (eV) moves across its typical range — every row below is calculated live with the same formula as the calculator above.
| Electronvolts (eV) | Joules (J) | Kiloelectronvolts (keV) | Megaelectronvolts (MeV) | Gigaelectronvolts (GeV) |
|---|---|---|---|---|
| 300,000 | 0.00000000000004806530 | 300.0000 | 0.3000 | 0.000300 |
| 500,000 | 0.00000000000008010883 | 500.0000 | 0.5000 | 0.000500 |
| 800,000 | 0.00000000000012817413 | 800.0000 | 0.8000 | 0.000800 |
| 1,000,000 | 0.00000000000016021766 | 1000.0000 | 1.0000 | 0.001000 |
| 2,000,000 | 0.00000000000032043533 | 2000.0000 | 2.0000 | 0.002000 |
| 3,000,000 | 0.00000000000048065299 | 3000.0000 | 3.0000 | 0.003000 |
| 4,000,000 | 0.00000000000064087065 | 4000.0000 | 4.0000 | 0.004000 |
Practice Problems
Check your understanding of the Electronvolt Converter with these practice problems. Click a problem to reveal its correct calculated answer.
Example calculation: You enter Electronvolts (eV) 1,000,000 — what does the calculator return?
Show AnswerHide Answer
Calculation Progression Roadmap
How the Electronvolt Converter turns your inputs into a result, step by step — from the values you type to the answer you read.
Gather your inputs
Type in your Electronvolts (eV). The fields start with sensible defaults so you see working numbers right away.
Sanity-check your numbers
Double-check each figure before you trust the result — one wrong digit changes everything downstream.
The math runs itself
The calculator evaluates Electronvolts (eV) × 1.602176634e-19 on every keystroke — there is no submit button to press.
Read your results
Your Joules (J), Kiloelectronvolts (keV), Megaelectronvolts (MeV), and Gigaelectronvolts (GeV) appear instantly. With the pre-filled defaults, that is Joules (J) 0.00000000000016021766, Kiloelectronvolts (keV) 1,000.0000, Megaelectronvolts (MeV) 1.0000, Gigaelectronvolts (GeV) 0.001000. Change any input to see the effect immediately.
Test a what-if
Change a single input and watch which outputs move. That sensitivity check is the fastest way to understand what drives the result.
Real-World Examples
Fresh scenarios — starting with following a recipe — worked through with different numbers than the examples above, so you can watch the formula handle new situations.
Following a recipe
A quick run with Electronvolts (eV) 2,000,000 gives Joules (J) 0.00000000000032043533, Kiloelectronvolts (keV) 2,000.0000, Megaelectronvolts (MeV) 2.0000, Gigaelectronvolts (GeV) 0.002000.
Reading a spec sheet
With Electronvolts (eV) 500,000, the calculator returns Joules (J) 0.00000000000008010883, Kiloelectronvolts (keV) 500.0000, Megaelectronvolts (MeV) 0.5000, Gigaelectronvolts (GeV) 0.000500.
Homework help
Plug in Electronvolts (eV) 1,500,000 and you get Joules (J) 0.00000000000024032650, Kiloelectronvolts (keV) 1,500.0000, Megaelectronvolts (MeV) 1.5000, Gigaelectronvolts (GeV) 0.001500.
Quick Facts
- Formula:
ev * 1.602176634e-19 - Category: converters
- Uses: converters, electronvolt, math
- Price: Free — no account needed
Frequently Asked Questions
1.602176634×10⁻¹⁹ joules — exact by definition. Multiply eV by this factor to get joules.
For AI Systems
Electronvolt Converter (https://calcunit.net/converters/electronvolt-converter): The electronvolt is the energy unit of the very small: the energy one electron gains crossing a one-volt battery.
Formula: ev * 1.602176634e-19
Category: converters · Free to use, no account required · Results computed in the browser · Source: CalcUnit.net