🔢 General Math

Roman Numeral Converter

Convert between Roman numerals and Arabic (decimal) numbers instantly. Supports numbers 1–3,999. Covers all standard Roman numeral rules with subtractive notation.

Convert Roman Numerals

Arabic Number (1–3999)

Enter a number or Roman numeral

ROMAN NUMERAL CHEAT SHEET

I	1	C	100
V	5	D	500
X	10	M	1,000
L	50	IV=4, IX=9, XL=40, XC=90, CD=400, CM=900