Roman Numeral Converter

Convert between decimal numbers and Roman numerals (1-3999).

Convert between decimal numbers and Roman numerals

Number (1-3999)

Roman (I, V, X, L, C, D, M)

Basic numerals: I=1, V=5, X=10, L=50, C=100, D=500, M=1000

Subtractive notation: Place smaller numerals before larger ones (IV=4, IX=9)

Common subtractive pairs: IV=4, IX=9, XL=40, XC=90, CD=400, CM=900

Valid range: 1 to 3999 (system doesn't support larger numbers)

No zero: Roman numerals don't have a symbol for zero

Uses: Commonly used in outlines, clock faces, and movie release years