What is a Roman Numeral Converter?
A Roman Numeral Converter is a free online tool that converts numbers between Roman numerals (I, V, X, L, C, D, M) and standard Arabic numbers (1, 2, 3...). Whether you need to decode a copyright year on a movie, convert a chapter number, or simply learn the Roman numeral system, this converter handles both directions instantly and accurately up to 3,999.
How do Roman numerals work?
Roman numerals use seven symbols: I (1), V (5), X (10), L (50), C (100), D (500), and M (1000). Numbers are formed by combining symbols and adding their values. When a smaller value appears before a larger one, it is subtracted (IV = 4, IX = 9). The system has no zero and traditionally represents numbers up to 3,999 (MMMCMXCIX). Understanding these rules helps you read dates on buildings, clocks, and historical documents.
Common use cases
Decode copyright years shown in Roman numerals at the end of films.
Convert chapter or volume numbers in textbooks and classical literature.
Read the time on traditional analog clocks that use Roman numerals.
Interpret dates carved on buildings, monuments, and gravestones.