Roman Numerals

Convert between decimal numbers and Roman numerals. Bidirectional with validation.

BidirectionalValidationReference Table

Number to RomanRoman to Number

Enter a number (1-3999)

Roman Numeral

MMXXIV

FAQ

What is the maximum Roman numeral?

Standard Roman numerals support values from 1 to 3999 (MMMCMXCIX). Values above 3999 require non-standard notation.

How does validation work?

When converting Roman to decimal, the tool verifies the numeral is in standard form by converting back and comparing.

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