Roman Numeral Converter

Free Roman numeral converter. Convert numbers to Roman numerals and vice versa (1-3999).

How the Roman Numeral Converter works

To convert a number to Roman numerals, the tool subtracts the largest applicable symbol value (M=1000, CM=900, D=500, etc.) repeatedly and appends the symbol until the number reaches zero. To convert back, it reads each Roman numeral character left to right, adding or subtracting values based on whether a smaller symbol precedes a larger one.

How to use the Roman Numeral Converter

  1. 1The Roman numeral converter is designed to be simple and fast.
  2. 2Enter a number to get its Roman numeral.
  3. 3Or enter a Roman numeral to get the number.
  4. 4Your result is shown immediately.

Examples

  • 2024 = MMXXIV
  • XLII = 42

Benefits

  • Completely free with no signup required.
  • Runs entirely in your browser for instant results and privacy.
  • Works on mobile, tablet and desktop.
  • Results can be copied with one click.

Frequently Asked Questions

Is the Roman numeral converter free to use?

Yes. The Roman numeral converter is 100% free, with no signup, no watermark and no hidden limits.

Does the Roman numeral converter store my data?

No. All calculations and processing happen locally in your browser. Nothing is uploaded to a server.

Does the Roman numeral converter work on mobile?

Yes. The Roman numeral converter is fully responsive and works on phones, tablets and desktop computers.

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