Roman Numeral Converter
Convert between numbers and Roman numerals instantly
Roman numeral will appear here
Roman Numeral Reference
| Symbol | Value | Example |
|---|---|---|
| I | 1 | III = 3 |
| IV | 4 | IV = 4 |
| V | 5 | VI = 6 |
| IX | 9 | IX = 9 |
| X | 10 | XIV = 14 |
| XL | 40 | XL = 40 |
| L | 50 | LX = 60 |
| XC | 90 | XC = 90 |
| C | 100 | CCC = 300 |
| CD | 400 | CD = 400 |
| D | 500 | DC = 600 |
| CM | 900 | CM = 900 |
| M | 1000 | MM = 2000 |
How Roman Numerals Work
Additive principle
Symbols are added left to right: VIII = 5+1+1+1 = 8
Subtractive principle
Smaller before larger means subtraction: IX = 10−1 = 9
Valid range
Standard Roman numerals cover 1 to 3999 (MMMCMXCIX)
No zero
Roman numerals have no symbol for zero — the concept came later