401 in Roman Numerals
CDI
401 in Roman numerals is CDI, and is spelled four hundred one.
How 401 breaks down
To write 401 in Roman numerals, combine CD (400) and I (1) to get CDI.
| Value | Roman |
|---|---|
| 400 | CD |
| 1 | I |
| 401 | CDI |
You can open 401 in the converter or browse the full Roman numerals chart.