How to use Roman Numerals Converter

What Roman Numerals Converter does#

Convert between Arabic numbers and Roman numerals both ways. Enter a number from 1 to 3999 to get its Roman numeral, or enter a Roman numeral to get the number — with validation that rejects malformed numerals. Runs entirely in your browser with one-click copy.

How to use it#

1. Open the tool and paste or type your input.
2. Choose the options you want.
3. See the result instantly, updated as you work.
4. Copy it to your clipboard in one click.

Your privacy#

Roman Numerals Converter runs entirely in your browser. Your data never leaves your device — there is no upload, and nothing is stored on our servers.