How do you write 3 in Roman numerals?

3 is written as III in Roman numerals: 3 = 3 (III). The symbols are then written from largest to smallest value.

What does III stand for?

III stands for the number 3. Reading left to right: III = 3.

How do you write "3rd" in Roman numerals?

Ordinal numbers use the same numerals as cardinal numbers, so "3rd" is written III — Roman notation has no separate ordinal form.

3 in Roman Numerals

How to write the number 3 in Roman numerals, with the full place-value breakdown.

The number 3 in Roman numerals

III

Place-value breakdown

3 = 3, so III = III. Roman numerals are written from largest to smallest value, left to right:

Place	Value	Roman	Rule
Ones	3	III	Additive rule: III = 3 (symbols are simply added)

About the number 3

The number 3 is written III in Roman numerals.

Looking for the ordinal form — "3rd in Roman numerals"? Roman notation makes no distinction between cardinal and ordinal numbers, so "3rd" is also written III.

Convert any number

Number (1-3999)

Roman numeral

III