Roman Numeral Converter

Clock faces are a deliberate stylistic exception centuries old — IIII balances the VIII opposite it visually. The standard modern convention, which this tool enforces, allows only the six subtractive pairs (IV, IX, XL, XC, CD, CM) and no more than three repeats of a symbol. IIII fails that rule even though history is full of it.

Classical numerals have no standard symbol above M (1000), and four Ms in a row breaks the repetition rule, so MMMCMXCIX is the ceiling. Medieval scribes drew a bar (vinculum) over letters to multiply by 1000 — V̄ for 5000 — but no modern context uses it, so 3999 is the practical limit.

A smaller symbol before a larger one subtracts: IV is 4, IX is 9, XC is 90. But only specific pairs are legal — I before V or X, X before L or C, C before D or M. That's why 99 is XCIX (90+9), never IC: the rules keep every number's representation unique.

Decompose by place value: 2000 is MM, 26 is XXVI, so 2026 is MMXXVI. Recent landmarks: 1999 is MCMXCIX (the famously long one), 2000 is MM (the famously short one). This decomposition is exactly what the converter shows, so tattoo and engraving dates can be triple-checked.