Roman Numeral Converter
Convert between decimal numbers and Roman numerals. Supports numbers 1-3999 (I-MMMCMXCIX). Bidirectional conversion with validation.
Symbol Values
Quick Examples
📜 Roman Numeral Rules
- • I=1, V=5, X=10, L=50, C=100, D=500, M=1000
- • A smaller value before a larger one means subtraction (IV=4, IX=9, XL=40)
- • No symbol repeats more than 3 times in a row
- • Only I, X, C can be used as subtractive numerals
- • Valid range: 1 (I) to 3999 (MMMCMXCIX)
Frequently Asked Questions
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