How do you write 40 in Roman numerals?

40 is written as XL in Roman numerals: 40 = 40 (XL). The symbols are then written from largest to smallest value.

What does XL stand for?

XL stands for the number 40. Reading left to right: XL = 40.

How do you write "40th" in Roman numerals?

Ordinal numbers use the same numerals as cardinal numbers, so "40th" is written XL — Roman notation has no separate ordinal form.

40 in Roman Numerals

How to write the number 40 in Roman numerals, with the full place-value breakdown.

The number 40 in Roman numerals

Place-value breakdown

40 = 40, so XL = XL. Roman numerals are written from largest to smallest value, left to right:

Place	Value	Roman	Rule
Tens	40	XL	Subtractive rule: XL = 50 − 10 (a smaller symbol before a larger one is subtracted)

About the number 40

The number 40 is written XL in Roman numerals.

Looking for the ordinal form — "40th in Roman numerals"? Roman notation makes no distinction between cardinal and ordinal numbers, so "40th" is also written XL.

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