40 = XL
40 is written with just XL.
XL 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 |
|---|---|
| 36 | XXXVI |
| 37 | XXXVII |
| 38 | XXXVIII |
| 39 | XXXIX |
| 41 | XLI |
| 42 | XLII |
| 43 | XLIII |
| 44 | XLIV |