Roman Numeral Converter
Convert between decimal numbers (1–3999) and Roman numerals. Enter a value in either field.
Roman Numeral Symbols
| Symbol | Value |
|---|---|
| I | 1 |
| V | 5 |
| X | 10 |
| L | 50 |
| C | 100 |
| D | 500 |
| M | 1000 |
How Roman Numerals Work
Roman numerals use additive and subtractive notation. When a smaller value appears before a larger value, it is subtracted (e.g., IV = 4). When a smaller value follows a larger value, it is added (e.g., VI = 6).
Subtractive pairs: IV(4), IX(9), XL(40), XC(90), CD(400), CM(900)
Example: 2024 → MMXXIV
M(1000) + M(1000) + X(10) + X(10) + IV(4) = 2024
M(1000) + M(1000) + X(10) + X(10) + IV(4) = 2024
Common Years in Roman Numerals
| Year | Roman |
|---|---|
| 1990 | MCMXC |
| 2000 | MM |
| 2010 | MMX |
| 2020 | MMXX |
| 2024 | MMXXIV |
| 2025 | MMXXV |