Roman Numeral Converter — Numbers to Roman Numerals Online
Convert Arabic numbers (1–3,999) to Roman numerals and Roman numerals back to Arabic numbers instantly.
Roman Numeral Reference Table
| Symbol | Value | Symbol | Value |
|---|---|---|---|
| I | 1 | L | 50 |
| IV | 4 | XC | 90 |
| V | 5 | C | 100 |
| IX | 9 | CD | 400 |
| X | 10 | D | 500 |
| XL | 40 | CM | 900 |
| — | — | M | 1000 |
Frequently Asked Questions
Standard Roman numerals go up to 3,999 (MMMCMXCIX). Numbers beyond that require special notation (an overline) not in the traditional system.
Roman numerals use subtractive notation: a smaller value placed before a larger one means subtraction. IV = 5 − 1 = 4. This rule applies to IX (9), XL (40), XC (90), CD (400), and CM (900).
No. The Roman numeral system has no symbol for zero. Ancient Romans used the Latin word "nulla" to express the concept.
MMXXVI = 2026. MM=2000, XX=20, VI=6. You can verify any conversion using the tool above.