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Roman Numeral Converter

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This free Roman numeral converter turns ordinary numbers into Roman numerals and back again, for any value from 1 to 3999 — handy for dates, tattoos, clock faces and movie copyright years. It validates the numeral form, so malformed input like IIII is rejected. Runs in your browser.

Convert numbers to Roman numerals and back — for dates, tattoos, clocks and movie credits. Works for 1 to 3999. Runs in your browser.

Result
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How to use Roman Numeral Converter

  1. 1 Choose a direction — Number → Roman or Roman → Number.
  2. 2 Type your number (e.g. 2026) or numeral (e.g. MMXXVI).
  3. 3 Read the converted result and copy it.
  4. 4 Use Swap to flip the direction quickly.

Frequently asked questions

What is the largest number it converts?

Standard Roman numerals go up to 3999 (MMMCMXCIX). Larger values need an overline (vinculum), which is not part of the basic system.

What is 2026 in Roman numerals?

2026 is MMXXVI. Type any year to get its numeral instantly.

Is my input uploaded?

No. The conversion runs entirely in your browser; nothing is sent to a server.

Does it work offline?

Yes. As a PWA it keeps working with no connection once loaded.

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