Roman Numerals Converter
Convert between regular numbers and Roman numerals instantly. Type a number like 2026 and get MMXXVI, or paste Roman numerals to decode them back to digits. Handles 1 to 3999 — covers every practical use from clock faces to movie sequels.
About Roman Numerals Converter
Roman numerals use seven symbols — I (1), V (5), X (10), L (50), C (100), D (500), M (1000) — combined by the subtractive rule: IV = 4, IX = 9, XL = 40, XC = 90, CD = 400, CM = 900.
Still widely used today: clock faces, film sequels (Rocky IV, Star Wars IX), Super Bowl titles (LVIII), chapter numbers, copyright years in film credits, formal outlines. Our converter handles the full standard range 1–3999.
The decoder finds Roman numerals in your text and replaces them with digits. The encoder finds numbers and converts them to Roman numerals. Both work on mixed text — non-numeric, non-Roman content passes through unchanged.