Konverter romertal til numerisk tal eller numerisk tal til romertal.
| Numerisk værdi | Romertal |
|---|---|
| 1 | I |
| 2 | II |
| 3 | III |
| 4 | IV |
| 5 | V |
| 6 | VI |
| 7 | VII |
| 8 | VIII |
| 9 | IX |
| 10 | X |
| 18 | XVIII |
| 19 | XIX |
| 20 | XX |
| 21 | XXI |
| 49 | XLIX |
| 50 | L |
| 51 | LI |
| 100 | C |
| 150 | CL |
| 500 | D |
| 1500 | MD |
| 1900 | MCM |
| 1990 | MCMXC |
| 2000 | MM |
| 2022 | MMXXII |
| 2023 | MMXXIII |
| 2024 | MMXXIV |
| 2025 | MMXXV |
| 2026 | MMXXVI |
| 2027 | MMXXVII |
| 2028 | MMXXVIII |
| 2029 | MMXXIX |
| 2030 | MMXXX |