Roman Numeral Converter

🏛️ About Roman Numeral Converter

Our free Roman Numeral Converter allows you to convert between Roman numerals and standard decimal numbers instantly. The tool supports conversions from 1 to 3,999 and works both ways - Roman to Number and Number to Roman.

Roman numerals use seven basic symbols: I (1), V (5), X (10), L (50), C (100), D (500), and M (1000). These symbols are combined to create all numbers from 1 to 3,999.

📖 How to Use

Roman to Number:

• Click "Roman to Number" mode
• Enter any Roman numeral (e.g., XIV, MCMXC)
• The decimal number appears instantly

Number to Roman:

• Click "Number to Roman" mode
• Enter any number between 1 and 3,999
• The Roman numeral appears instantly

📜 Roman Numeral Rules

• Basic Symbols: I=1, V=5, X=10, L=50, C=100, D=500, M=1000
• Additive: When larger values come before smaller, add them (VI = 6)
• Subtractive: When smaller values come before larger, subtract them (IV = 4)
• Repetition: I, X, C, M can be repeated up to 3 times (III = 3, XXX = 30)
• No Repetition: V, L, D are never repeated
• Subtractive Pairs: Only these are valid: IV, IX, XL, XC, CD, CM

✨ Key Features

• Bi-directional: Convert Roman to Number or Number to Roman
• Instant Conversion: Results appear as you type
• Wide Range: Supports numbers 1 to 3,999
• Quick Reference: Built-in Roman numeral chart
• Common Examples: One-click conversion of common numerals
• Validation: Automatically checks for valid Roman numerals
• 100% Free: No registration or payment required

💡 Common Uses

• Reading Roman numerals in historical documents
• Understanding dates on buildings and monuments
• Decoding clock faces with Roman numerals
• Reading chapter numbers in books
• Understanding Super Bowl numbering
• Movie sequel numbers (Star Wars, Rocky, etc.)
• Copyright dates in film credits
• Outlines and lists in formal documents
• Educational purposes and homework help

📝 Conversion Examples