Roman Numeral Converter
Convert numbers to Roman numerals, or Roman numerals back to numbers.
Roman Numeral Converter
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How Roman Numerals Work
Roman numerals use combinations of seven letters — I (1), V (5), X (10), L (50), C (100), D (500), and M (1000) — to represent numbers. A smaller numeral placed before a larger one is subtracted (like IV for 4), while a smaller numeral after a larger one is added (like VI for 6).
Standard Roman numerals only represent whole numbers from 1 to 3999.
Frequently Asked Questions
Why can't I convert numbers above 3999?
Standard Roman numeral notation has no symbol for numbers 4000 and above, some historical extensions exist using bars over letters, but they aren't part of common usage.
Can Roman numerals represent zero or negative numbers?
No, the traditional Roman numeral system has no representation for zero or negative numbers.
Why does IV mean 4 and not IIII?
Subtractive notation (placing a smaller numeral before a larger one) became the standard convention over time, though IIII does appear historically, especially on clock faces.