Ⅻ Roman Numeral Converter

Convert Roman numerals and integers.

Number (1–3999)

Roman Numeral

Roman Numeral Rules

I=1 V=5 X=10 L=50 C=100 D=500 M=1000. Subtract when smaller precedes larger (IV=4, IX=9, XL=40, XC=90, CD=400, CM=900).

Largest Roman numeral?

Standard system goes to 3,999 (MMMCMXCIX). With vinculum (overline), ancient Romans expressed larger numbers.