What is the maximum number supported?

Standard Roman numerals represent values from 1 to 3,999 (MMMCMXCIX).

How does the subtractive notation work?

In Roman numerals, placing a smaller value before a larger one means subtraction. For example, IV = 4 (5-1), IX = 9 (10-1).

Is zero representable in Roman numerals?

No. The Roman numeral system has no symbol for zero. It starts from 1 (I).

Roman Numeral Converter

Bidirectional translator between common Arabic numerals (1, 2, 3) and classic Roman numerals (I, II, III).

Arabic Normal Numbers

Max supported: 3999

Roman Numerals

Free Roman Numeral Converter

Roman numerals remain in common use today — from clock faces and movie sequels to academic outlines and historical dates. Our bidirectional converter instantly translates between standard Arabic numbers (1, 2, 3...) and Roman numerals (I, II, III...), supporting values from 1 to 3,999.

The tool also includes a quick reference table of common Roman numeral values, making it educational as well as practical. Perfect for students, writers, designers, and anyone working with classical notation.

How to Use This Tool

Enter an Arabic number or Roman numeral.
The tool auto-detects the input type and converts to the other format.
Copy the result.

Frequently Asked Questions

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