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Roman Numerals

Convert between Arabic and Roman (1 – 3,999)

Enter a number or Roman numeral
Arabic
Roman
Generate a range
ArabicRoman
Standard Roman numeral values
Subtractive notation rules

IV = 4  ·  IX = 9  ·  XL = 40  ·  XC = 90  ·  CD = 400  ·  CM = 900

A smaller numeral placed before a larger one is subtracted. Only I, X, and C may be used as subtractive numerals, and each may only precede the next two higher values.