42 = XLII
Split 42 into 40 + 2 and write each part: XL (40) + II (2) = XLII.
XLII uses subtraction: XL = 40. A smaller symbol before a larger one is subtracted.
| 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 |
|---|---|
| 38 | XXXVIII |
| 39 | XXXIX |
| 40 | XL |
| 41 | XLI |
| 43 | XLIII |
| 44 | XLIV |
| 45 | XLV |
| 46 | XLVI |