12 = XII
12 in Roman numerals is XII.
Twelve written with the letters X I I.
12 in words: Twelve
Twelve in Roman numerals is XII, which is X (10) followed by II (2). It is purely additive, ten and then two ones, so there is nothing to subtract. Short and unmistakable, it is one of the first numerals most people learn to read.
XII is probably the single most-seen Roman numeral in daily life, because it sits at the top of almost every clock and watch face that uses numerals. It also stands for a dozen, the twelve months, and the twelfth in any series, which keeps it in front of you constantly.
How 12 breaks down
Reading XII from left to right, each group is added together to reach 12:
| Group | Value | Place |
|---|---|---|
| X | 10 | tens |
| II | 2 | ones |
| XII | 12 | total |
Frequently asked questions
What is 12 in Roman numerals?
12 in Roman numerals is XII.
How do you write 12 in words?
12 is written "Twelve" in English.
What number comes before XII?
The number before XII is 11, written XI in Roman numerals.
What number comes after XII?
The number after XII is 13, written XIII in Roman numerals.
Related numbers
Last updated July 22, 2026. Reviewed for accuracy against the standard rules for Roman numerals.