43 in Roman Numerals
Forty-three is written XLIII in Roman numerals. It uses the subtractive rule, where a smaller glyph placed before a larger one is taken away rather than added, which keeps the numeral short and is the part most people find fiddly.
How XLIII is formed
Reading left to right, 43 breaks into these additive parts. Each Roman symbol is added in turn to reach the total.
XL + I + I + I = 40 + 1 + 1 + 1 = 43.
Where 43 in Roman numerals is used
- Chapter, act or appendix numbering in books and plays.
- Super Bowl XLIII and other numbered championship events.
- Outlines, exam questions and list items in formal documents.
- Monarch and pope names, for example the 43rd of a royal line.
Good to know about 43
- Super Bowl XLIII was played in 2009; the NFL numbers its championship in Roman numerals (with the one-off exception of Super Bowl 50).
Convert another number
43 is written XLIII in Roman numerals.
Frequently asked questions
How do you write 43 in Roman numerals?
Write 43 as XLIII, combining XL + I + I + I. Start from the largest value that fits and work down until nothing is left over.
Why is 43 not written XXXXIII?
XLIII uses the subtractive rule: a smaller symbol placed before a larger one is taken away, so you never repeat a symbol four times. XXXXIII breaks that rule, which is why XLIII is the only correct form.
Which Super Bowl is XLIII?
Super Bowl XLIII is the 43rd Super Bowl, played in 2009. The NFL sets its championship number in Roman numerals, which is why so many people look up values like XLIII.
How do you say XLIII in words?
XLIII is 43, spoken as "forty-three". The numeral is read as the single value 43, not as its separate letters.