Roman Numeral Converter

Convert numbers to Roman numerals and Roman numerals back to numbers — supports 1 to 3999, both directions.

Arabic number (1–3999): Roman numeral:

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Type in either field — the other updates live. Valid symbols: I V X L C D M.

How to use

Enter an Arabic number (1–3999) to see its Roman numeral, or type a Roman numeral to decode it back. Both fields update live.

Is this Roman numeral converter free?

Yes, free and unlimited.

What range is supported?

Standard Roman numerals from 1 to 3999 (I to MMMCMXCIX).

Can I convert Roman numerals to numbers?

Yes — type a Roman numeral (e.g. MCMLXXV) and the Arabic number appears.

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