Roman Numeral Converter
Convert between Arabic and Roman numerals
Quick Conversions
About Roman Numeral Conversion
Roman numerals use seven symbols: I (1), V (5), X (10), L (50), C (100), D (500), and M (1000). They are still used today for clock faces, book chapters, movie sequels, and formal numbering. The standard system supports numbers from 1 to 3,999.
The subtractive principle (IV = 4, IX = 9, XL = 40, etc.) keeps representations compact. Our converter handles both directions instantly.