Roman Numeral Converter

Convert between numbers and Roman numerals (1-3999). Auto-detects direction and provides instant results.

Roman Numeral Tips

How Roman Numerals Work

Roman numerals use letters (I, V, X, L, C, D, M) to represent numbers. Example: 2024 = MMXXIV.

Rules

No zero. Numbers are formed by combining and subtracting values. Largest to smallest, left to right.

Examples

IV = 4, IX = 9, XL = 40, XC = 90, CD = 400, CM = 900.