Roman Numeral Converter

Bidirectional converter between standard Arabic numbers and Roman numerals. Supports values from I (1) to M̄M̄M̄CMXCIX (3,999,999) using vinculum notation for large numbers. Shows the breakdown of each Roman symbol.

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Common Use Cases

  • Convert chapter or section numbering
  • Decode year inscriptions on buildings
  • Format Super Bowl or Olympic game numbering
  • Educational exercises on Roman numerals

Frequently Asked Questions

Why is there no zero in Roman numerals?

Roman numerals are an additive/subtractive system evolved from tally marks — they represent quantities, not positions. The concept of zero as a number was introduced to Europe from Indian mathematics via Arabic scholars in the medieval period, by which time Roman numerals were already established.

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Tool Info

CategorymathAI EnhancementNoData StorageZero retention