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Roman Numeral Converter

Convert between Arabic numbers and Roman numerals instantly. Supports values from 1 to 3,999. Great for clocks, book chapters, and historical dates.

Used 25.6K times today

M = 1000
CM = 900
D = 500
CD = 400
C = 100
XC = 90
L = 50
XL = 40
X = 10
IX = 9
V = 5
IV = 4
I = 1

How to Use Roman Numeral Converter

  1. 1

    Choose the conversion direction

    Select whether you want to convert from an Arabic number to Roman numerals or from Roman numerals to an Arabic number.

  2. 2

    Enter your value

    Type the Arabic number (1–3,999) or the Roman numeral string into the input field.

  3. 3

    See the result instantly

    The converted value appears immediately as you type, with no button press required.

Frequently Asked Questions

What is the largest number convertible to Roman numerals?
The standard Roman numeral system supports values up to 3,999 (MMMCMXCIX). Numbers beyond this are not representable in classical Roman numerals.
What do the Roman numeral symbols stand for?
I = 1, V = 5, X = 10, L = 50, C = 100, D = 500, M = 1000. Subtractive notation (e.g. IV = 4, IX = 9) is used for specific combinations.
Where are Roman numerals still used today?
Roman numerals appear on clock faces, in book and movie chapter numbering, on building cornerstones, in sports event naming (e.g. Super Bowl), and in formal document outlines.

About Roman Numeral Converter

The Roman Numeral Converter on Utilko lets you translate between everyday Arabic numbers and classical Roman numerals in both directions. Whether you need to decode the year on a building's cornerstone, find the Roman numeral equivalent for a chapter heading, or understand a clock face, the tool delivers the answer in real time as you type.

The converter correctly handles all subtractive notation rules (IV, IX, XL, XC, CD, CM) that are often misunderstood. It covers the full classical range from I (1) through MMMCMXCIX (3,999), making it suitable for almost every real-world use case.

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