Roman Numeral Converter
Convert numbers to Roman numerals and Roman numerals to numbers online. Free Roman numeral converter — instant results.
Three steps to get started
Choose direction
Convert a number to Roman numerals, or parse Roman numerals to a number.
Enter your value
Type a number (1–3999) or a Roman numeral string like XLII or MMXXVI.
See the result
The converted value appears instantly. Click Copy to use it anywhere.
Convert numbers to Roman numerals instantly
Roman numerals have been used for over 2,000 years and remain visible everywhere in modern life. Movie titles, Super Bowl logos, legal documents, architectural inscriptions, and formal publications all use Roman numerals.
The 7 symbols:
- I = 1
- V = 5
- X = 10
- L = 50
- C = 100
- D = 500
- M = 1000
The key rule: when a smaller symbol precedes a larger one, subtract it (IV = 4, IX = 9, XL = 40, XC = 90, CD = 400, CM = 900). Otherwise add the values.
All conversion happens in your browser — private, instant, no server requests.