Roman Numeral Calculator

Convert between Arabic numbers and Roman numerals, or convert dates to and from Roman numeral format.

Roman Numeral Date Converter

Convert dates between Arabic numbers and Roman numerals (e.g., 2025/09/20 or MMXXV/IX/XX).

Quick Tips

  • Use _V for vinculum (e.g., _V = 5,000).
  • IV means 4 (5 - 1), not 6.
  • Dates use YYYY/MM/DD format.

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