Roman Numeral Converter

Convert between Arabic numbers and Roman numerals instantly.

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Arabic Number (1–3,999,999)

Roman Numeral

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Frequently Asked Questions

Q.What are the basic Roman numerals?

I=1, V=5, X=10, L=50, C=100, D=500, M=1000. When a smaller value precedes a larger one, it is subtracted (e.g., IV=4, IX=9, XL=40).

Q.What is the largest Roman numeral?

Traditionally MMMCMXCIX (3,999). With vinculum (bar) notation, numbers up to millions are possible.