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Roman Numeral Converter

Convert numbers to Roman numerals and back

Number (1–3999)

About Roman Numeral Converter

Converts numbers to Roman numerals and Roman numerals back to numbers. Shows the breakdown of each symbol so you can follow the logic. Useful for reading copyright years on buildings and films, writing chapter numbers in formal documents, and decoding Super Bowl or Olympic numbering. Supports 1 to 3,999 — the maximum with standard notation.

Common Use Cases

  • →Figuring out what year a Roman numeral on a film or building represents
  • →Writing chapter or section numbers in formal documents
  • →Decoding Super Bowl numbers
  • →Converting clock face numerals

Frequently Asked Questions

What are the symbols?+
I=1, V=5, X=10, L=50, C=100, D=500, M=1000. Subtractive notation: IV=4, IX=9, XL=40, XC=90, CD=400, CM=900.
Why only up to 3,999?+
Standard Roman numeral rules allow at most three consecutive identical symbols (MMM=3000). There is no symbol larger than M. Numbers above 3,999 require a bar over the symbol (vinculum) to indicate multiplication by 1000.
Is there a Roman numeral for zero?+
No. The system has no symbol for zero, which is a key reason the Hindu-Arabic system replaced it for arithmetic.