Roman Numeral Converter
Convert numbers to Roman numerals and Roman numerals back to numbers. Just type either form — the conversion is automatic, with validation for invalid input.
How to use the Roman Numeral Converter
Type a number such as 1994 to get its Roman form.
Or type a Roman numeral such as MCMXCIV to get the number back.
The result and any validation message appear instantly — use Copy result to keep it.
Frequently asked questions
What numbers can be converted?
Standard Roman numerals cover 1 to 3999. Numbers outside that range are not representable with the classic symbols, so the tool reports an error.
How do subtractive pairs work?
A smaller symbol before a larger one is subtracted, so CM is 900, XC is 90 and IV is 4. The tool accepts only valid, canonical numeral strings.
How do I write 1994 in Roman numerals?
1994 is MCMXCIV — 1000 (M) + 900 (CM) + 90 (XC) + 4 (IV). Enter 1994 or MCMXCIV and the tool converts either way.