Roman Numeral Converter

Convert numbers (1-3999) to Roman numerals and Roman numerals back to numbers. Bidirectional and instant.

Number → Roman Numeral

Roman Numeral

Roman Numeral → Number

Number

Roman Numeral Reference

Rules

  • Symbols are placed from largest to smallest value, left to right.
  • A smaller symbol before a larger one means subtraction (IV = 4, IX = 9).
  • Only I, X, C, and M can be repeated (up to 3 times).
  • V, L, and D are never repeated or used for subtraction.
  • Standard Roman numerals only cover 1-3999.

️ Symbol Values

I= 1
V= 5
X= 10
L= 50
C= 100
D= 500
M= 1000

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