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Unit Conversion Calculators
Roman Numeral Converter
Convert a number to Roman numerals, or a Roman numeral back to a number.
Result
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About the Roman Numeral Converter
Roman numerals use combinations of the letters I, V, X, L, C, D and M to represent numbers from 1 to 3,999. Larger values are typically written first, with a smaller value placed before a larger one to indicate subtraction (like IV for 4).
Formula: Repeatedly subtract the largest possible Roman value (from M=1000 down to I=1, including subtractive pairs like CM=900 and IV=4) and append its symbol.
Select a direction, enter your number or numeral, and get an instant conversion — handy for clock faces, book chapters, movie sequels and historical dates.
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