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Roman Numerals Converter

Convert between Roman numerals and numbers (1-3999) with step-by-step explanations

Free to use, no watermarks, runs in your browser—nothing uploads to our servers

Conversion Mode

Number (1-3999)

Basic Symbols

I = 1

V = 5

X = 10

L = 50

C = 100

D = 500

M = 1000

Subtractive Notation

IV = 4

IX = 9

XL = 40

XC = 90

CD = 400

CM = 900

I, II, III

1, 2, 3

IV, V, VI

4, 5, 6

IX, X, XI

9, 10, 11

XLIX, L, LI

49, 50, 51

XC, C, CI

90, 100, 101

CD, D, DC

400, 500, 600

CM, M, MI

900, 1000, 1001

MCMLXXXIV

1984

1. Addition: When a larger numeral comes before a smaller one, add them (e.g., VI = 5 + 1 = 6).

2. Subtraction: When a smaller numeral comes before a larger one, subtract it (e.g., IV = 5 - 1 = 4).

3. Repetition: A symbol can be repeated up to three times (e.g., III = 3, XXX = 30).

4. Range: This converter supports numbers from 1 to 3999.

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