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Roman Numeral Converter

Convert numbers to roman numerals and roman numerals back to numbers, with a step-by-step breakdown, for any value from 1 to 3,999.

Number

Or roman numeral

How to use it

Type a number from 1 to 3999 to get its roman numeral.
Or type a roman numeral to convert it back.

How it works

Roman numerals use I (1), V (5), X (10), L (50), C (100), D (500) and M (1000). Symbols are added from largest to smallest, and six subtractive pairs replace four repeats: IV (4), IX (9), XL (40), XC (90), CD (400), CM (900).

FAQ

What is 2026 in roman numerals?

MMXXVI.

Why do roman numerals stop at 3999?

Standard notation has no symbol above M; 4000 would need MMMM or a vinculum (overline), which is non-standard.

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