Roman Numeral Converter

Convert numbers ↔ Roman numerals (1-3999)

Number (1-3999)

Roman Numeral

Roman Numeral Chart

Symbol	Value
I	1
V	5
X	10
L	50
C	100
D	500
M	1000

Rules

Subtractive: IV=4, IX=9, XL=40, XC=90, CD=400, CM=900
Additive: VI=6, XV=15, LX=60, DC=600
No symbol repeats more than 3 times (III=3, but 4=IV)
V, L, D are never repeated

Where Roman Numerals Are Used

Movie sequels (Rocky IV), monarch names (Elizabeth II), Super Bowl numbering, book chapters, clock faces, copyright dates, and building cornerstones.