40 in Roman Numerals
40 written in Roman numeralsXL
40 = XL. Read left to right: XL (40) = 40.
Going the other way, the Roman numeral XL equals the number 40.
How to write 40 in Roman numerals
- Tens: 40 is XL.
XL uses subtractive notation: XL means 40. A smaller symbol placed before a larger one is subtracted from it.
A common mistake is writing 40 as XXXX. Standard Roman numerals only allow I before V and X, X before L and C, and C before D and M, and no symbol repeats more than three times, so the correct form is XL.
40 is an even number and written with 2 symbols in Roman numerals.
Where you might see XL
- Super Bowl XL was the 40th Super Bowl, played in early 2006.
- Book chapters, outlines, movie sequels and royal names use numerals like XL for the number 40.
Multiples of XL
| Sum | Number | Roman numeral |
|---|---|---|
| 40 × 2 | 80 | LXXX |
| 40 × 3 | 120 | CXX |
| 40 × 5 | 200 | CC |
| 40 × 10 | 400 | CD |
Numerals near XL
| Number | Roman numeral |
|---|---|
| 35 | XXXV |
| 36 | XXXVI |
| 37 | XXXVII |
| 38 | XXXVIII |
| 39 | XXXIX |
| 40 | XL |
| 41 | XLI |
| 42 | XLII |
| 43 | XLIII |
| 44 | XLIV |
| 45 | XLV |
Questions
How do you write 40 in Roman numerals?
40 is written XL.
What number is XL?
XL is 40.