Roman Numeral Converter
Convert between numbers and Roman numerals.
Number → Roman
Roman → Number
How to use Roman Numeral Converter
- 1Enter a number (1–3999) or a Roman numeral.
- 2The conversion updates live.
Why use this tool
- Two-way conversion in one tool.
- Validates Roman numeral input for correct formatting.
Frequently asked questions
Why is the maximum 3999?
Standard Roman numerals don't have a symbol for 5000 or higher without special notation, so 3999 (MMMCMXCIX) is the practical upper limit.