Roman Numerals Converter

Convert between Roman numerals and Arabic numbers quickly and accurately. This tool supports bidirectional conversion for numbers from 1 to 3999.

How to Use

1. Select the conversion type (Arabic to Roman or Roman to Arabic)
2. Enter the value you want to convert
3. Click the "Convert" button to see the result

About Roman Numerals

Roman numerals are a numeral system that originated in ancient Rome and remained the usual way of writing numbers throughout Europe well into the Late Middle Ages. The system uses combinations of letters from the Latin alphabet to signify values.

Roman Numeral Symbols

• I = 1
• V = 5
• X = 10
• L = 50
• C = 100
• D = 500
• M = 1000

Conversion Rules

• When a smaller value appears before a larger value, it is subtracted (e.g., IV = 4, IX = 9)
• When a smaller value appears after a larger value, it is added (e.g., VI = 6, XI = 11)
• Symbols can be repeated up to three times in succession (e.g., III = 3, XXX = 30)
• This converter supports numbers from 1 to 3999

Common Examples

• 2024 = MMXXIV
• 1999 = MCMXCIX
• 444 = CDXLIV
• 100 = C
• 50 = L