About the Roman Numeral Converter
Type a number to see it in Roman numerals, or type a Roman numeral to see the number. Handy for years on films and buildings, clock faces, book chapters, events — and checking a tattoo before it’s permanent.
How does the Roman Numeral Converter work?
Roman numerals use seven letters: I = 1, V = 5, X = 10, L = 50, C = 100, D = 500 and M = 1,000. Letters are added from largest to smallest, and a smaller letter before a larger one is subtracted: IV = 4, IX = 9, XL = 40, XC = 90, CD = 400, CM = 900.
Each place — thousands, hundreds, tens and ones — is written separately and joined, so 2026 = MM + XX + VI = MMXXVI.
Roman numerals
| Number | Roman | Number | Roman |
|---|---|---|---|
| 1 | I | 40 | XL |
| 4 | IV | 50 | L |
| 5 | V | 90 | XC |
| 9 | IX | 100 | C |
| 10 | X | 400 | CD |
| 20 | XX | 500 | D |
| 30 | XXX | 1,000 | M |