Roman Numeral Converter
Converters
100% in-browser
Convert a number to Roman numerals, or Roman numerals back to a number.
How to use the Roman Numeral Converter
- 1 Enter a number (1–3999) or Roman numerals.
- 2 Choose the direction.
- 3 Copy the result.
About the Roman Numeral Converter
Roman numerals use letters to represent numbers. They appear on clocks, in book chapters and for years. This tool converts standard Roman numerals from 1 to 3999 in both directions.
It runs entirely in your browser.
Frequently asked questions
What range is supported?
Standard Roman numerals cover 1 to 3999.
Is subtractive notation handled?
Yes — forms like IV, IX and XL are produced and parsed correctly.
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