Roman Numeral Converter
Convert between Roman numerals and decimal numbers with validation and support for values up to 3999 (MMMCMXCIX).
Conversion Direction
Decimal Number
Quick Reference
| Roman | Decimal | Roman | Decimal |
|---|---|---|---|
| I | 1 | L | 50 |
| V | 5 | C | 100 |
| X | 10 | D | 500 |
| IV | 4 | M | 1000 |
| IX | 9 | XL | 40 |
| XC | 90 | CD | 400 |
| CM | 900 | MCMXCIV | 1994 |