Roman Numeral Converter

Roman numerals use letters from the Latin alphabet (I, V, X, L, C, D, M) to represent numbers in an additive and subtractive system developed in ancient Rome. They remain in use today on clock faces, in film production years, for book chapters and volume numbering, in formal legal documents, and for naming recurring events (Super Bowl LVIII, Pope John Paul II). The subtractive notation rules — IV for 4, IX for 9, XL for 40, XC for 90, CD for 400, CM for 900 — are easy to mistake, and even careful writers can miscalculate when constructing or reading them manually. This converter handles both directions: Arabic numerals to Roman and Roman to Arabic, for any integer from 1 to 3,999, the maximum value in standard Roman numeral notation. A film researcher cataloguing a studio's archive might need to decode the copyright year MCMXCVIII at the end of a movie's credits to confirm the exact release date. A game developer generating in-game chapter screens might need to output level numbers as Roman numerals and wants to verify that level 49 correctly renders as XLIX rather than IL. A student formatting a dissertation might need to number the front matter pages in Roman numerals and ensure that page 14 of the preface is correctly marked xiv with consistent lowercase formatting. These are the kinds of precise, error-prone tasks where a dedicated converter eliminates guesswork entirely. Students, writers, software developers, and legal professionals who regularly work with numbered documents, historical records, or branded content are the people who benefit most from having a reliable reference tool at hand. All conversion happens directly in your browser, so no numbers are sent to any server and your input stays completely private. Whether you are translating a single date or verifying a long sequence of chapter headings, this tool gives you instant, accurate results without any manual calculation required.