Roman Numeral Converter

Convert between Roman numerals (I, V, X, L, C, D, M) and Arabic numbers (1-3999). Supports both directions.

 
Roman (I-X) or Arabic (1-3999)
  
Converted result

Common Roman Numeral Conversions

About Roman Numerals

Roman numerals use letters to represent numbers: I (1), V (5), X (10), L (50), C (100), D (500), M (1000). This converter supports numbers from 1 to 3999. Roman numerals are read from left to right, with larger values typically appearing first.

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

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