Roman numeral converter

Convert Roman numerals to numbers and convert numbers to Roman numerals.

How to Use
  1. 1Select the conversion mode: Number to Roman or Roman to Number.
  2. 2Enter a number (1-3999) or a Roman numeral string.
  3. 3The result will be displayed in real time below.
  4. 4A Roman numeral reference table is provided at the bottom.
Mode
Number to Roman
Result
Enter a value to convert
Reference
M1000
CM900
D500
CD400
C100
XC90
L50
XL40
X10
IX9
V5
IV4
I1

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