12 in Roman numerals is XII, built from X + II (X = 10, II = 2), which add up to 12.
How 12 is written in Roman numerals
The number 12 is written XII in Roman numerals. Roman numerals use seven letters — I (1), V (5), X (10), L (50), C (100), D (500) and M (1000) — combined from largest to smallest, with subtractive pairs such as IV (4) and IX (9). Need another number? Use the Roman numeral converter or see the 1–100 chart.
Building XII step by step — take the largest value that fits, write its symbol, subtract, repeat.
| Write | Value | Remaining before | Remaining after |
|---|
| X | 10 | 12 | 2 |
| I | 1 | 2 | 1 |
| I | 1 | 1 | 0 |
Where you see XII
On a clock face, the 12th hour is marked XII. Regnal and papal names use it the same way — a 12th ruler of a name is styled XII, as in Louis XII or Pope John XII. The 12th Super Bowl was Super Bowl XII; the NFL has used Roman numerals for every edition except Super Bowl 50.
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Frequently Asked Questions
What is 12 in Roman numerals?
12 in Roman numerals is XII. Reading it left to right gives X (10) + I (1) + I (1) = 12. The number below it, 11, is written XI, and the number above it, 13, is written XIII.
How do you write 12 in Roman numerals?
Write 12 as XII, combining X (10) + I (1) + I (1). Roman numerals are built by taking the largest value that still fits, writing its symbol and subtracting it, which reduces 12 in 3 steps: X leaves 2, I leaves 1, I leaves 0. Every symbol keeps the same value wherever it stands, so the order is fixed and XII is the only standard spelling of 12.
What are the Roman numerals either side of 12?
Either side of 12 the Roman numerals are XI for 11 and XIII for 13, with XII between them. Those three numerals are 2, 3 and 4 letters long, so the length changes as you count. Roman numerals have no digit positions, so each step can rewrite the numeral rather than bumping a single digit.
What is 12 times ten in Roman numerals?
12 times ten is 120, which is CXX in Roman numerals, not XII with a letter added on the end. Roman numerals have no place value, so multiplying by ten respells the whole numeral instead of shifting digits along. Compare XII for 12 with CXX for 120.