🔢 Roman Numeral Converter

Examples

Decimal to Roman

  • 1 = I
  • 4 = IV
  • 5 = V
  • 9 = IX
  • 10 = X
  • 40 = XL
  • 50 = L
  • 90 = XC
  • 100 = C
  • 400 = CD
  • 500 = D
  • 900 = CM
  • 1000 = M

Roman to Decimal

  • I = 1
  • IV = 4
  • V = 5
  • IX = 9
  • X = 10
  • XL = 40
  • L = 50
  • XC = 90
  • C = 100
  • CD = 400
  • D = 500
  • CM = 900
  • M = 1000

Our Roman Numeral Converter tool helps you easily convert between decimal numbers and Roman numerals. Whether you're studying history, working on a project that requires Roman numerals, or just curious about how they work, this tool makes conversion simple and accurate.

The converter supports numbers from 1 to 3,999,999 (with overline notation for large numbers) and follows standard Roman numeral rules including subtractive notation (like IV for 4, IX for 9). Simply enter a number or Roman numeral and click "Convert" to see the result instantly. Use the "Generate Random Number" button to try out different values!

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