| I = 1 |
| V = 5 |
| x = 10 |
| L = 50 |
| C = 100 |
| D = 500 |
| M = 1,000 |
| 1 = I | 11 = XI | 21 = XXI |
| 2 = II | 12 = XII | 25 = XXV |
| 3 = III | 13 = XIII | 30 = XXX |
| 4 = IV | 14 = XIV | 40 = XL |
| 5 = V | 15 = XV | 49 = XLIX |
| 6 = VI | 16 = XVI | 50 = L |
| 7 = VII | 17 = XVII | 51 = LI |
| 8 = VIII | 18 = XVIII | 60 = LX |
| 9 = IX | 19 = XIX | 90 = XC |
| 10 = X | 20 = XX | 99 = XCIX |