Roman Numeral Converter

Convert numbers to Roman numerals and vice versa.

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Roman Numeral Converter

Number → Roman

Roman → Number

Roman Numeral Converter

Roman numerals are a number system originating in ancient Rome that uses letter combinations to represent values. They are still used today for clock faces, movie sequels, book chapters, Super Bowl numbering, and formal documents. Our converter translates between Arabic numerals and Roman numerals instantly.

Common Uses

  • Converting years to Roman numerals for monuments and certificates
  • Understanding Roman numerals on clocks and watches
  • Movie, book, and event numbering (Super Bowl LIX)
  • Learning and education

Frequently Asked Questions

What are the basic Roman numeral symbols?
I=1, V=5, X=10, L=50, C=100, D=500, M=1000. Smaller numerals before a larger one are subtracted (IV=4, IX=9, XL=40, XC=90, CD=400, CM=900). Repeating a numeral up to 3 times adds its value (III=3, XXX=30).
What is the largest Roman numeral?
Standard Roman numerals go up to 3,999 (MMMCMXCIX). For larger numbers, a bar over a numeral multiplies it by 1,000 (V̄ = 5,000, X̄ = 10,000, M̄ = 1,000,000), though this is rarely used in modern contexts.
Is this calculator free to use?
Yes. All calculators on zenicalculator.com are completely free with no registration required.
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