What does the Roman Numeral Converter do?

The GoChronos Roman Numeral Converter converts any integer from 1 to 3,999 to Roman numerals and converts any valid Roman numeral string back to an integer — instantly, in either direction.

What are the basic Roman numeral symbols?

I = 1, V = 5, X = 10, L = 50, C = 100, D = 500, M = 1000. Combinations follow subtractive notation: IV = 4, IX = 9, XL = 40, XC = 90, CD = 400, CM = 900.

What is the largest number in standard Roman numerals?

The largest number expressible in standard notation is 3,999 (MMMCMXCIX). Numbers beyond 3,999 require an overline (vinculum) above M to indicate multiplication by 1,000, which is not part of standard modern usage.

Is the converter free?

Yes. Free on GoChronos, works offline.

Roman Numeral Converter — Numbers & Dates