How to write 40 in Roman numerals
Split 40 into thousands, hundreds, tens and ones, write each part with Roman symbols and join them:
| Symbols | Value | Rule |
|---|---|---|
| XL | 40 | subtract: X before L |
40 in Roman numerals is written XL. Here is how it breaks down symbol by symbol.
Split 40 into thousands, hundreds, tens and ones, write each part with Roman symbols and join them:
| Symbols | Value | Rule |
|---|---|---|
| XL | 40 | subtract: X before L |
| Number | Roman numeral |
|---|---|
| 80 | LXXX |
| 400 | CD |
| 41 | XLI |
| 39 | XXXIX |
40 in Roman numerals is XL (XL = 50 − 10 = 40).
XL is the Roman numeral for 40.