Loading page
About this tool
Convert electronvolts to megajoules instantly. Free, bidirectional, and fully in-browser.
1 electronvolt equals 1.602177e-25 megajoules — enter any electronvolt value to convert it to megajoules instantly. This Electronvolt to Megajoule converter is a client-side tool: it applies a single multiplication (MJ = eV × 1.602177e-25) in your browser, updates the moment you type, and works in both directions — edit either field, or press swap, to convert megajoules back to electronvolts. A reference table lists common electronvolt values already converted, and nothing you enter is sent to a server.
Open Electronvolt to Megajoule Converter on AltFTool — it loads instantly in your browser.
Type the value you want to convert into the Electronvolt field.
Read the equivalent in megajoules in the result field, and copy it if needed.
Use the decimal-places slider for more or less precision, or press swap to convert megajoules to electronvolts.
The result updates as you type, and the swap button flips the conversion to megajoule → electronvolt without reloading.
The conversion uses the precise factor (MJ = eV × 1.602177e-25), so the number matches a manual calculation to the decimal places you choose.
A slider sets 0–10 decimal places, and very small or very large results switch to scientific notation instead of rounding to zero.
Everything runs locally in your browser — no upload, no account, no limit on conversions.
One electronvolt is 1.602177e-25 megajoules. Multiply the electronvolt value by 1.602177e-25 to convert. For example, 10 eV = 1.602177e-24 MJ.
MJ = eV × 1.602177e-25. This tool applies it automatically and shows a worked example: 10 eV = 1.602177e-24 MJ.
Yes. Press the swap button, or type into the megajoule field, and the tool converts megajoules to electronvolts using the inverse of the same relationship.
It uses the standard energy and work definition (MJ = eV × 1.602177e-25), not a rounded approximation, so results are exact to the number of decimal places you select.
Yes. The converter is a browser-side script with no network calls: your values are never uploaded, and once the page has loaded it keeps working without a connection.
Add the Electronvolt to Megajoule Converter widget to your blog or website — free, responsive, no signup. Just keep the “Widget by AltFTool” credit link visible.
<iframe src="https://www.altftool.com/embed/widget/electronvolts-to-megajoules-converter"
title="Electronvolt to Megajoule Converter — free AltFTool widget"
width="100%" height="640" style="border:0;border-radius:12px;overflow:hidden"
loading="lazy" referrerpolicy="no-referrer-when-downgrade" allow="clipboard-write"></iframe>
<p style="font-size:12px;margin:4px 0 0">Widget by <a href="https://www.altftool.com/tools/all/electronvolts-to-megajoules-converter?utm_source=embed&utm_medium=widget" rel="nofollow">AltFTool — free online tools</a></p>