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Roman Numeral Converter

Convert between Arabic numbers and Roman numerals (1–3999).

Quick Reference

M
1000
CM
900
D
500
CD
400
C
100
XC
90
L
50
XL
40

About Roman Numeral Converter

Roman Numeral Converter translates any Arabic integer (1–3999) to Roman numerals and back. It follows standard Roman numeral rules including subtractive notation. Perfect for history students, designers, and anyone needing to format dates or outlines in Roman style.

  • Converts Arabic to Roman numerals
  • Converts Roman to Arabic
  • Supports 1 to 3999
  • Shows subtractive notation rules