Convert numbers to and from Roman numerals
Built & maintained by Pappu Venkata Subbi Reddy, founder of Clacify
Clacify's Roman Numeral Converter translates any number from 1 to 3,999 into its Roman numeral representation (I, V, X, L, C, D, M) and converts Roman numerals back to decimal. Roman numerals are still used on clock faces, building cornerstones, book preface page numbers, copyright years in movie credits, Super Bowl numbering, and formal outlines.
Roman numerals use symbols: I=1, V=5, X=10, L=50, C=100, D=500, M=1000. Symbols are generally written largest to smallest left to right. Subtractive notation: IV=4, IX=9, XL=40, XC=90, CD=400, CM=900. Example: 2024 = MMXXIV (1000+1000+10+10+4). 3999 = MMMCMXCIX is the largest standard Roman numeral.
Roman numerals persist in formal and decorative contexts: clock faces (II, IV, XII), book front matter pages (i, ii, iii), movie copyright years (MMXXIV = 2024), Super Bowl numbering (Super Bowl LVI), monarchs and popes (King Charles III, Pope John Paul II), outlines in legal documents, and building foundation stones.