Roman Numeral Converter

Instantly convert Arabic numbers to Roman numerals and back. Range 1–3999. Symbol table and writing rules included.

1 to 3999

→
MMXXV
→
2025

Quick pick

Symbol table

Writing rules

  • →Symbols I, X, C, M may be repeated up to 3 times in a row.
  • →A smaller symbol before a larger one means subtraction: IV = 4, IX = 9.
  • →V, L, D are never repeated and never placed before a larger symbol.
  • →The maximum number in the classical system is 3999 (MMMCMXCIX).

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