Roman Numeral Converter
Convert numbers to Roman numerals and back — 1 to 3999. Convert numbers to Roman numerals and Roman numerals to numbers instantly. Covers 1–3999 with subtractive notation explained. Free Roman numeral converter.
À propos de Roman Numeral Converter
Clock faces, movie sequels, book chapters and Super Bowls keep Roman numerals alive. This converter translates both directions across the classical range 1–3999: enter 2026 and get MMXXVI, paste XLVII and get 47. It applies standard subtractive notation (IV, IX, XL, CM) and flags invalid forms like IIII or VV, with a compact reference chart of the seven symbols and their values.
Comment utiliser Roman Numeral Converter
- Choose your direction.
- Enter a number (1–3999) or a Roman numeral.
- The conversion appears instantly.
- Check the chart for how the symbols combine.
Fonctionnalités clés
- Numbers → Roman numerals (1–3999)
- Roman numerals → numbers with validation
- Correct subtractive notation (IV not IIII)
- Symbol reference chart included
Why does Roman numeration stop at 3999?
What is subtractive notation?
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