18 = XVIII
Split 18 into 10 + 8 and write each part: X (10) + VIII (8) = XVIII.
| Symbol | I | V | X | L | C | D | M |
|---|---|---|---|---|---|---|---|
| Value | 1 | 5 | 10 | 50 | 100 | 500 | 1,000 |
Need another number? Use the Roman numeral converter (both directions).
| Number | Roman numeral |
|---|---|
| 14 | XIV |
| 15 | XV |
| 16 | XVI |
| 17 | XVII |
| 19 | XIX |
| 20 | XX |
| 21 | XXI |
| 22 | XXII |