Is there a Roman numeral for zero?

No, the Roman numeral system has no symbol for zero.

Why is 4 written as IV instead of IIII?

In Roman numerals, a smaller value placed before a larger one is subtracted from it. Since I comes before V, IV means V-I=4. This subtractive notation avoids repeating a symbol four times in a row.

Roman Numeral Converter

Number (1-3999)

Roman Numeral (e.g. MCMXCIV)

MCMXCIVRoman Numeral

42Number

About Roman Numerals

Roman numerals are an ancient number system that uses the letters I, V, X, L, C, D, and M to represent values: I=1, V=5, X=10, L=50, C=100, D=500, M=1000. When a smaller symbol appears before a larger one, it is subtracted; when it appears after, it is added (e.g. IV=4, VI=6). Roman numerals are still used today on clock faces, in book chapters, movie credits, and to denote anniversaries or event editions (like Super Bowl numbering).

Frequently Asked Questions

Common questions about Roman numerals

Using standard notation, the largest representable number is 3999 (MMMCMXCIX). Larger numbers require additional notation such as a bar over a numeral to multiply it by 1000.