2001 = MMI
2001 in Roman numerals is MMI.
Two thousand one written with the letters M M I.
2001 in words: Two thousand one
The year 2001 is written MMI in Roman numerals. Reading it as MM (2000) + I (1) shows how a modern date maps onto the ancient system, which is exactly why you still see numerals like this carved on cornerstones and stamped at the end of film credits.
Years are the most common real-world use of Roman numerals today. If you are engraving a plaque, dating a design or planning a tattoo, MMI is the form you want, and the generator on this site can render it as a clean stencil.
How 2001 breaks down
Reading MMI from left to right, each group is added together to reach 2001:
| Group | Value | Place |
|---|---|---|
| MM | 2000 | thousands |
| I | 1 | ones |
| MMI | 2001 | total |
Frequently asked questions
What is 2001 in Roman numerals?
2001 in Roman numerals is MMI.
How do you write 2001 in words?
2001 is written "Two thousand one" in English.
What number comes before MMI?
The number before MMI is 2000, written MM in Roman numerals.
What number comes after MMI?
The number after MMI is 2002, written MMII in Roman numerals.
Related numbers
Last updated July 22, 2026. Reviewed for accuracy against the standard rules for Roman numerals.