Roman Numeral Converter
Convert Arabic numbers to Roman numerals and back instantly. Supports 1–3999. Free online Roman numeral converter.
Frequently Asked Questions
What is the Roman numeral system?
The Roman numeral system is a numeral system originating in ancient Rome. It uses combinations of letters from the Latin alphabet — I, V, X, L, C, D, and M — to represent numbers. It was the standard way of writing numbers throughout Europe well into the Late Middle Ages.
What is the valid range for Roman numerals?
Standard Roman numerals cover values from 1 (I) to 3999 (MMMCMXCIX). The number 0 and negative numbers have no representation in the classical system. Values above 3999 traditionally required a bar over the numeral to indicate multiplication by 1000, but that convention is not universally supported.
What are common uses of Roman numerals today?
Roman numerals are still widely used today: clock and watch faces, chapter numbers in books, movie sequel numbering (e.g. Rocky IV), Super Bowl designations, year of production in films, names of monarchs and popes, and outlines in formal documents.