Convert a Roman Number to Regular Number

Working with Roman numerals like XIV, XL, or MMMCMXCIX? The Convert a Roman Number to Regular Number tool helps you turn them back into plain integers instantly. Whether you’re decoding historical texts, converting ranked labels, or just curious about what CDXLIV equals this tool makes it quick and accurate. You can handle one value or an entire list in a flash.

Paste your input above or import a file below.
No file chosen
Supported file types: .txt, .csv, .tsv, .log, .json, .xml, .md, .ini, .yaml, .yml, .html, .htm, .css
Total items: 0
Options
Trim extra spaces
Remove blank lines
Remove duplicates

How to Use:

Paste your Roman numerals into the input box on the left. Make sure each one is on its own line, like this:

I  
IV  
IX  
XL  
C  
MMMCMXCIX

Rather import a file? No problem. Click “Choose File” to upload a .txt, .csv, or any supported plain-text type. You’ll see a list of accepted formats right below the input area. The output updates live as soon as your input is recognized.

In the Options box, you’ll find a few toggles to help clean things up. You can trim extra spaces, remove empty lines, and eliminate duplicates. These help prevent formatting issues before the conversion starts.

As results appear on the right, you’ll see a counter underneath showing how many Roman numerals were processed. Use “Copy Output” to copy the list or click “Export to File” to download it. Hit “Clear All” if you want to reset everything in one go.

What Convert a Roman Number to Regular Number can do:

This tool reads your Roman numeral input and turns it into real numeric values from 1 to 3999. It handles standard notation (like IV, XC, or DCCC) and updates results live as you go. Whether you’re dealing with imported files or hand-typed lists, the conversion stays fast and accurate.

It works entirely in your browser, so nothing ever gets uploaded everything’s instant and private.

Example:

Input:

IV  
IX  
XIII  
XLIV  
CM  
MMMCMXCIX

Output:

4  
9  
13  
44  
900  
3999

Common Use Cases:

You might be converting academic data, decoding documents, formatting list items, or handling exported Roman numerals from another system. Whatever your task, Convert a Roman Number to Regular Number makes it easy to clean, preview, and convert everything at once without scripts, formulas, or manual typing.

Useful Tools & Suggestions:

Once you’ve got your regular numbers, Convert a Regular Number to Roman Number is perfect for flipping them back handy for double-checking. And if you’re working with a bunch of entries, Remove Symbols from Around Words can help clean up any extra punctuation that sneaks in.

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