Roman Numeral Converter
Convert numbers to Roman numerals and back. Supports 1 to 3,999,999 with vinculum notation.
Frequently Asked Questions
What's the largest Roman numeral?
Classical Roman numerals go to 3,999 (MMMCMXCIX). For larger numbers, Romans used vinculum — an overline that multiplies by 1,000. This tool supports up to 3,999,999.
Is zero a Roman numeral?
No — the Romans had no symbol for zero. Medieval scholars used 'N' (for 'nullae') but this was never standard.