Roman Numeral Converter
Convert between decimal numbers and Roman numerals.
Supports values from 1 to 3999 in both directions.
Conversion Result
Roman Numeral System uses seven symbols:
| Symbol | Value |
|---|---|
| I | 1 |
| V | 5 |
| X | 10 |
| L | 50 |
| C | 100 |
| D | 500 |
| M | 1000 |
Subtractive notation rules:
- IV = 4 (5 - 1), IX = 9 (10 - 1)
- XL = 40 (50 - 10), XC = 90 (100 - 10)
- CD = 400 (500 - 100), CM = 900 (1000 - 100)
Rules:
- A smaller numeral before a larger one means subtraction
- A smaller numeral after a larger one means addition
- No symbol repeats more than 3 times consecutively
- Standard range: 1 to 3999 (MMMCMXCIX)
Examples: 2024 = MMXXIV, 1776 = MDCCLXXVI, 42 = XLII