Convert a Number to Roman Number

Want to change regular numbers into classic Roman numerals? The Convert a Number to Roman Number tool does that in real time. Whether you’re working with 1, 44, or even 3999, this tool gets you the correct Roman output instantly. It’s perfect for formatting ranked data, adding elegance to labels, or just exploring historical number systems. You can convert one number or hundreds in bulk no formulas or plugins required.

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:

Start by entering your numbers in the input box on the left. You can paste or type values one per line like this:

1  
4  
9  
40  
3999

You can also import a file using the “Choose File” button. Supported types like .txt, .csv, .json, and more are listed under the import field. Once loaded, the tool immediately processes your data and shows the Roman numeral output in the box on the right.

To clean up your input, head to the Options box. There, you can trim extra whitespace, remove blank lines, and deduplicate repeated values. These toggles help keep everything neat before conversion.

Live output updates with each change, and the total number of Roman numerals is displayed underneath the output. Hit “Copy Output” to grab the results or “Export to File” to save them. The “Clear All” button resets everything so you can start over anytime.

What Convert a Number to Roman Number can do:

This tool reads any valid integer (1–3999) and converts it into a proper Roman numeral. It handles common formatting issues like spaces or extra lines and gives you real-time feedback as you go. With options to clean and filter your list before converting, you stay in control.

Everything runs in the browser no servers, no delays, no hassle.

Example:

Input:

1  
4  
9  
44  
90  
3999

Output:

I  
IV  
IX  
XLIV  
XC  
MMMCMXCIX

Common Use Cases:

Whether you’re labeling lists, formatting ranks, designing classical-style interfaces, or just need clean conversions for historical data Convert a Number to Roman Number makes it simple. You don’t need a chart or a formula, just paste your numbers and get perfect Roman output right away.

Useful Tools & Suggestions:

If you ever need to flip it back, Convert a Roman Number to Regular Number has you covered it’s good for sanity checks too. And when you’re prepping lists for conversion, Remove Unwanted Characters can clear out anything that might mess with formatting.

Related Tools