Everyday tool
Roman Numeral Converter
Enter a number or Roman numeral and get the other format immediately.
Runs in your browser. No upload.
Number to Roman numeral
Roman numeral to number
Conversions run only in your browser.
About this tool
Roman Numeral Converter made simple.
Convert whole numbers from 1 to 3,999 locally. Useful for dates, names, outlines, quizzes and quick checks.
Common questions
About Roman Numeral Converter.
How do I convert a number to a Roman numeral?
Enter a whole number from 1 to 3,999 in the first box. The converter returns the standard Roman numeral immediately.
Can I convert a Roman numeral back to a number?
Yes. Enter a valid Roman numeral in the second box to see its number value.