40 in Roman Numerals
The number 40 is written XL in Roman numerals. Reading left to right and adding the values gives 40 = 40. Roman numerals use seven letters: I (1), V (5), X (10), L (50), C (100), D (500) and M (1000). A smaller letter before a larger one means subtraction (IV = 4, IX = 9, XL = 40, XC = 90, CD = 400, CM = 900).
XL in names
- Super Bowl XL, played on 5 February 2006. Wikidata
Popes, monarchs, films and Super Bowls whose name carries XL. Source: Wikidata, retrieved 11 October 2026.
Nearby & popular values
Frequently asked
What is 40 in Roman numerals?
40 in Roman numerals is XL.
How is 40 written in Roman numerals?
40 is written XL, which breaks down as 40 = 40.
Is there a Roman numeral for zero?
No. The Roman system has no symbol for zero, which is one reason it was eventually replaced for calculation.