How do you write 1 in Roman numerals?

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

What does I stand for?

I stands for the number 1. Reading left to right: I = 1.

How do you write "1st" in Roman numerals?

Ordinal numbers use the same numerals as cardinal numbers, so "1st" is written I — Roman notation has no separate ordinal form.

1 in Roman Numerals

How to write the number 1 in Roman numerals, with the full place-value breakdown.

The number 1 in Roman numerals

Place-value breakdown

1 = 1, so I = I. Roman numerals are written from largest to smallest value, left to right:

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

About the number 1

The number 1 is written I in Roman numerals.

Looking for the ordinal form — "1st in Roman numerals"? Roman notation makes no distinction between cardinal and ordinal numbers, so "1st" is also written I.

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