Convert between decimal numbers and Roman numerals
Enter 1-3999 or I-MMMCMXCIX
Enter a value to convert
Convert numbers between binary, octal, decimal, and hexadecimal
Convert between decimal, binary, octal, hexadecimal, and Roman numerals
Convert between metric and imperial units for length, weight, temperature, and more
The Roman Numeral Converter provides instant conversion between Arabic numbers (1-3999) and Roman numerals (I-MMMCMXCIX) and more. Simply enter a value in any unit and see all other conversions updated in real time. Click any result to copy it to your clipboard. This tool is essential for education, clock reading, document numbering, and historical reference. All calculations are performed locally in your browser with no data sent to any server, ensuring fast results and complete privacy.