MeV to eV Converter

One megaelectronvolt equals 1000000 electronvolts (eV). To convert megaelectronvolts to electronvolts, multiply by 1000000; to go back the other way, multiply by 1.0000e-6 instead.

The converter above does it as you type and shows the working underneath, so you can check the arithmetic rather than take the number on trust.

What megaelectronvolts and electronvolts actually measure

Megaelectronvolt (MeV) — A megaelectron-volt is a million electron-volts. Nuclear physics and radiation therapy.

Electronvolt (eV) — An electron-volt is the energy one electron gains crossing one volt — 1.602 × 10⁻¹⁹ joules. Atomic and particle physics, and semiconductor band gaps.

MeV to eV conversion table

The most common values, worked out in advance. Anything not listed can be typed straight into the converter.

How to convert megaelectronvolts to electronvolts by hand

Multiply the number of megaelectronvolts by 1000000.

For example, 25 MeV × 1000000 = 25000000 eV.

Going the other way, divide by 1000000 — or multiply by 1.0000e-6, which is the same thing and easier to do in your head.

Everything runs in your browser

There is no server involved in the calculation. The numbers you type never leave your device, nothing is logged, and the page keeps working with no connection once it has loaded. That is not a marketing line — it is simply how the tool is built, because a calculation like this has no reason to touch a network.