A handy converter for Roman numerals and number bases. Turn a number (1–3999) into a Roman numeral, convert Roman back to a number, or switch between binary, octal, decimal and hexadecimal. Fully in your browser, no upload.
Your data is processed entirely in your browser. Nothing is uploaded to any server.
Yes, it is free and runs in your browser.
No. Conversions are computed locally on your device.
No. It works in any modern browser.
Enter your values and Roman Numeral Converter computes the result instantly, all on your device.