Roman Numeral Converter

Convert any number from 1 to 3999 to Roman numerals, or convert Roman numerals back to decimal. Supports all standard Roman numeral symbols.

❓ Frequently Asked Questions

What is the highest Roman numeral? +

Standard Roman numerals go up to 3999 (MMMCMXCIX).

Are lowercase Roman numerals supported? +

Yes, input is automatically converted to uppercase.