How do you write 11 in Roman numerals?

11 is written as XI in Roman numerals: 11 = 10 (X) + 1 (I). The symbols are then written from largest to smallest value.

What does XI stand for?

XI stands for the number 11. Reading left to right: X = 10, I = 1.

How do you write "11th" in Roman numerals?

Ordinal numbers use the same numerals as cardinal numbers, so "11th" is written XI — Roman notation has no separate ordinal form.

11 in Roman Numerals

How to write the number 11 in Roman numerals, with the full place-value breakdown.

The number 11 in Roman numerals

Place-value breakdown

11 = 10 + 1, so XI = X + I. Roman numerals are written from largest to smallest value, left to right:

Place	Value	Roman	Rule
Tens	10	X	Additive rule: X = 10 (symbols are simply added)
Ones	1	I	Additive rule: I = 1 (symbols are simply added)

About the number 11

The number 11 is written XI in Roman numerals.

Looking for the ordinal form — "11th in Roman numerals"? Roman notation makes no distinction between cardinal and ordinal numbers, so "11th" is also written XI.

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