Roman Numeral Converter
Convert between Arabic numbers and Roman numerals.
Number → Roman
Roman → Number
About the Roman Numeral Converter
This tool converts between Arabic numerals (1–3999) and Roman numerals in both directions. Type a number to get its Roman representation, or type a Roman numeral to get the Arabic equivalent. Supports all standard Roman numerals including the subtractive notation (IV, IX, XL, XC, CD, CM).
Roman numerals are still used today in clock faces, book chapters, movie sequel numbering, copyright years, and formal document sections. The Roman numeral system uses seven symbols: I (1), V (5), X (10), L (50), C (100), D (500), and M (1000).