Roman Numerals Converter
Convert numbers to Roman numerals and back.
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Type 2026 to get MMXXVI — or paste a Roman numeral to decode it. Validation rejects malformed numerals like IIII.
Frequently asked questions
What is the valid range?
Standard Roman numerals cover 1 to 3999 — there is no standard zero or larger notation.
Does it validate strict form?
Yes — only canonical numerals are decoded; nonstandard forms like IM or VV are rejected.