Roman Numeral Converter

Convert a regular number to Roman numerals, or a Roman numeral back to a number.

Roman Numeral Converter

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Direction

Number (1-3999)

Result

MMXXVI

Standard Roman numerals represent whole numbers from 1 to 3,999.

How Roman numerals work

Roman numerals combine seven symbols (I=1, V=5, X=10, L=50, C=100, D=500, M=1000). Symbols are added together left to right, except when a smaller symbol appears before a larger one, which means subtract it instead (like IV = 4, not IIII).

Example

2026 converts to MMXXVI (1000+1000+10+10+5+1). Going the other way, MCMXCIV converts to 1994.

Step-by-step guide

Choose your direction - number to Roman, or Roman to number.
Enter the value and read the converted result.

Common mistakes

Repeating a symbol more than 3 times in a row (like IIII instead of IV) - standard Roman numeral rules use the subtractive form instead.

Trying to represent 0 or negative numbers - the standard Roman numeral system has no symbol for zero and doesn't represent negative values.

Frequently asked questions

Why is there no Roman numeral for zero?

The Roman numeral system was developed for counting and trade before the concept of zero as a number was in common use in Western mathematics.

What's the largest number I can convert?

Standard Roman numerals go up to 3,999 (MMMCMXCIX). Larger numbers historically used a bar over a symbol to multiply it by 1,000, which isn't included in this standard converter.

Where are Roman numerals still commonly used?

Clock faces, book chapter numbers, movie sequel titles, Super Bowl numbering, and monarch or Pope names (like Elizabeth II) are common modern uses.

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