How do you write 2001 in Roman numerals?

2001 is written as MMI in Roman numerals: 2001 = 2000 (MM) + 1 (I). The symbols are then written from largest to smallest value.

What does MMI stand for?

MMI stands for the number 2001. Reading left to right: MM = 2000, I = 1.

How do you write "2001st" in Roman numerals?

Ordinal numbers use the same numerals as cardinal numbers, so "2001st" is written MMI — Roman notation has no separate ordinal form.

2001 in Roman Numerals

How to write the number 2001 in Roman numerals, with the full place-value breakdown.

The number 2001 in Roman numerals

MMI

Place-value breakdown

2001 = 2000 + 1, so MMI = MM + I. Roman numerals are written from largest to smallest value, left to right:

Place	Value	Roman	Rule
Thousands	2000	MM	Additive rule: MM = 2000 (symbols are simply added)
Ones	1	I	Additive rule: I = 1 (symbols are simply added)

About the number 2001

The number 2001 is written MMI in Roman numerals. MMI is the year 2001 written in Roman numerals — used on monuments, copyright notices and clock faces.

Looking for the ordinal form — "2001st in Roman numerals"? Roman notation makes no distinction between cardinal and ordinal numbers, so "2001st" is also written MMI.

Convert any number

Number (1-3999)

Roman numeral

MMI