12 in Roman numerals

XII

12 = XII

Working: X = 10, I = 1, I = 1

The number 12 is written as XII in Roman numerals.

Roman numerals are built by adding symbol values together from largest to smallest: X = 10, I = 1, I = 1. Where a smaller symbol appears before a larger one — as in IV for 4 or IX for 9 — it is subtracted rather than added, which keeps the notation short.

Structurally, XII is 3 symbols long. It is entirely additive: every symbol adds to the running total, with no smaller symbol standing before a larger one. The longest run is 2 identical symbols.

XII is the largest numeral on a standard clock face, and the reason the first twelve numerals are the most widely recognised of all. It is also a dozen — a unit that survives in eggs, in inches to the foot, and in the twenty-four hour day split into two twelves.

Nearby numbers

Number	Roman numeral
7	VII
8	VIII
9	IX
10	X
11	XI
14	XIV
15	XV
16	XVI

Try another value

Decimal number (1–3999)

Roman numeral

MMXXIV

Reference

X10

L50

C100

D500

M1000

Frequently asked questions

How do you write 12 in Roman numerals?

12 is written XII. It breaks down as X = 10, I = 1, I = 1.

What are the seven Roman numeral symbols?

I is 1, V is 5, X is 10, L is 50, C is 100, D is 500, and M is 1,000. All Roman numerals are combinations of these seven symbols, and there is no symbol for zero.

For any other value, use the full Roman Numeral Converter on BrainVert.