Roman Numeral Converter

Convert numbers to Roman numerals and Roman numerals back to numbers. Free online tool.

Convert

Number to Roman Roman to Number

Arabic number

Enter a number from 1 to 3999. Use one value per line for batch conversion.

Result Enter a value to start.

Roman numeral -

Input -

Direction Number to Roman

Items 0

Breakdown

Converted parts will appear here.

Reference values

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

Tool Introduction

Convert everyday numbers into standard Roman numerals and turn Roman numerals back into Arabic numbers. It is useful for book chapters, outlines, clock faces, movie credits, event editions, Super Bowl numbers, and history references.

This converter uses the modern subtractive notation most English-language readers expect: IV for 4, IX for 9, XL for 40, XC for 90, CD for 400, and CM for 900. Values are limited to 1 through 3999 because that is the common range written with I, V, X, L, C, D, and M.