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Roman Numeral Converter

Convert numbers to Roman numerals, or Roman numerals back to numbers — both directions, instantly and locally.

Number → Roman

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Roman → Number

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Quick reference

How Roman numerals work

Seven letters represent values: I=1, V=5, X=10, L=50, C=100, D=500, M=1000. Numbers are built by adding values together, and a smaller value placed before a larger one is subtracted — so IV is 4 and IX is 9. This converter supports the standard range of 1 to 3,999.

About Roman Numeral Converter

Convert numbers to Roman numerals and Roman numerals back to numbers, both directions instantly. Includes a quick reference chart and explanation of how Roman numerals work.

FAQ

What is Roman Numeral Converter?
Convert numbers to Roman numerals and Roman numerals back to numbers, both directions instantly. Includes a quick reference chart and explanation of how Roman numerals work.
Is Roman Numeral Converter free to use?
Yes, it is completely free — no sign-up or payment needed.
Do I need to install or sign up?
No. It runs entirely in your browser — nothing to download and no account required.
How do I use Roman Numeral Converter?
Open the tool, follow the on-screen steps, and your result is ready in seconds — you can copy or download it right away.
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