Roman Numerals Converter
Convert standard Arabic numbers into Roman numerals and decode Roman numerals back into numbers.
Number (1 to 3999)
4 chars
Roman Numeral Output
0 chars
Quick Tips & Features
✓Roman numerals use subtractive notation (IV = 4, IX = 9, XL = 40, XC = 90, CD = 400, CM = 900).
✓Standard Roman numerals can represent numbers up to 3,999 (MMMCMXCIX).
✓Commonly used in copyright years, movie sequels, book chapters, and clocks.