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What is Roman Numeral Converter?

Roman numerals use seven letters (I, V, X, L, C, D, M) to represent numbers and are still used today for clock faces, chapter numbers, movie release years, Olympic games, and formal documents. DailyDevTools' Roman Numeral Converter converts any integer (1–3,999) to Roman numerals and any valid Roman numeral string back to an integer — with subtractive notation (IV = 4, IX = 9) handled correctly.

How to use Roman Numeral Converter

1. 1Enter an integer (1–3,999) to convert to Roman numerals
2. 2Or enter a Roman numeral string (e.g., MCMXCIX) to convert to an integer
3. 3The converter handles subtractive notation automatically (IV=4, IX=9, XL=40, XC=90, CD=400, CM=900)
4. 4Browse the reference table showing all Roman numeral values

Frequently asked questions