Roman Numerals Calculator

Roman Numerals Calculator

Arabic Number (1-3999)

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Roman Numeral

Quick Examples:

Roman Numeral Reference:

Basic Symbols

I = 1

V = 5

X = 10

L = 50

Larger Values

C = 100

D = 500

M = 1000

Subtractive

IV = 4

IX = 9

XL = 40

XC = 90

More Subtractive

CD = 400

CM = 900

Rules:

Range: This calculator supports numbers from 1 to 3,999.
Repetition: I, X, C, and M can be repeated up to 3 times.
Subtraction: Only I, X, and C can be used as subtractive prefixes.
Order: Symbols are written from largest to smallest, left to right.
Auto-convert: Results update automatically as you type.