Roman Numerals Converter

This translation tool allows you to convert to and from roman numerals. Simply enter into the box either a whole numeric value between 1 and 3999 or a set of roman numerals. Then, let the converter do the rest.

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Enter either a whole numeric value or a set of roman numerals below.

Translation result

A list of all roman numerals and their values are available further down this page.


Whilst every effort has been made in building this roman numerals converter, we are not to be held liable for any special, incidental, indirect or consequential damages or monetary losses of any kind arising out of or in connection with the use of the converter tools and information derived from the web site. This roman numerals converter is here purely as a service to you, please use it at your own risk. Do not use calculations for anything where loss of life, money, property, etc could result from inaccurate conversions.

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Roman numeral symbols

Below is a list of roman numeral symbols and their numeric value.


Roman numerals history

Roman numerals 1 to 10 on black background

Roman numerals were the standard system of numbering used by the Romans in ancient Rome. Used primarily for counting, they were adapted from the Etruscan numerals system. The original system of numerals used in the classical era was altered slightly in the Middle Ages, resulting in the numeral system that we use today where letters represent values as numerals.

Some of the common uses of roman numerals in everyday life include use in clock faces, chapter numbering and copyrighting in books, and numbered lists. Sometimes dates are given in Roman numerals for the dating of movies and television programmes. Also, some sporting events, such as the Olympics, the Superbowl and Wrestling events use them.

If you take one of each individual roman numeral and add them together the total is 1666.

Roman numerals charts

The fabulous folks at have created some great roman numerals cheat sheets for quick reference of this ancient numbers system. So, do head over there and download them.

Roman numerals explained

With roman numerals it's not just important to note each numeral itself, but also the order in which they appear. For example, when a smaller number appears infront of a larger number it means that the smaller number should be deducted from the larger one. If the smaller number appears after it, it gets added.

An example: IX means 9 (10-1), where as XI means 11 (10+1).

There are, of course, rules to bear in mind. To learn more about roman numerals, where they came from and how they work, see the article all about roman numerals.

The roman numerals converter script on this page was adapted from a script created by Steven H Gibbs.

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