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Roman Numeral Converter - Integer to Roman, Roman to Integer

Free online Roman numeral converter. Convert numbers to Roman numerals and back. Understand the rules of Roman numerals.

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    Key Symbols

    The Legacy of Roman Numerals

    Roman numerals originated in ancient Rome and remained the usual way of writing numbers throughout Europe well into the Late Middle Ages. They are still used today in many specialty contexts, such as clock faces, movie copyright dates, and ceremonial names (like King Charles III).

    I
    1
    Unus
    X
    10
    Decem
    C
    100
    Centum
    M
    1000
    Mille