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Home/Other Calculators/Roman Numeral Converter

Roman Numeral Converter

Convert between Roman numerals and numbers

calculators.romanNumeral.inputMode

calculators.romanNumeral.enterDecimal (1-3999)

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Written by the EachTools Team

Last updated: January 2026

How Roman Numerals Work

Roman numerals use combinations of letters (I, V, X, L, C, D, M) to represent values. They follow additive and subtractive rules.

Steps

Enter an Arabic number (1-3999) or a Roman numeral.
View the conversion in the other format.