12 in Roman numerals
12 is written XII. In chunks: X (10) + I (1) + I (1) = 12.
The answer
XII
12 in Roman numerals is XII.
How XII is built
To write it, split 12 into 10 + 2. 10 is X, 2 is II, so 12 is X then II: XII.
To read it, XII has 3 chunks, and none of them is a take-away pair, so every chunk is added.
| Chunk | Worth | Why |
|---|---|---|
| X | 10 | Add |
| I | 1 | Add |
| I | 1 | Add |
The mistake to watch for
Miscounting the letters in XII
XII is one X then two I's, all added together. One letter more or fewer makes a different number: XI is 11 and XIII is 13.
Check it with the converter
Change the number 12 by one to see how its numeral changes. The rule numbers it gives are the three rules on the Roman numerals page.
Converter set to XII (12).
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Questions parents ask
What is 12 in Roman numerals?
12 is XII.
What comes before and after XII?
11 is XI and 13 is XIII.
Does XII use subtraction?
No. Every letter in XII is the same size as, or smaller than, the letter before it, so you just add them all.
What is the biggest letter in XII?
X, which is 10. XII has 3 letters.
Where might you see XII?
On clock faces, where the hours from I to XII go round the dial, at the very top.
When do children learn XII?
In England, Year 3 children learn to tell the time on clocks with Roman numerals from I to XII, so XII is one of the first numerals in the curriculum. Year 4 reads numerals to 100.
Want to practise more?
Explore the diagnostic for more practice activities.