12 in Words
How do you write 12 in words?
The number 12 is written twelve in words. As an ordinal it is twelfth, and on a check you would write Twelve and 00/100.
Last updated 24 August 2026
Other ways to write it
| Cardinal | twelve |
|---|---|
| Ordinal | twelfth |
| Currency | twelve dollars |
| Check format | Twelve and 00/100 |
How 12 is written
12 is the sum of its place values, 10 + 2, and is written twelve.
Its ordinal form is twelfth — only the final element takes the ordinal ending — and on a check the amount line reads "Twelve and 00/100", where 00/100 stands for zero cents.
The last part is not built from its digits: English names 10 to 19 with single irregular words, so this is twelve, never ten two.
For house-style rules on spelling out numbers, see the Chicago Manual of Style.
Facts about 12
- 12 is an even number.
- It is not a prime number.
- Digit sum: 3.
- Roman numerals: XII.
- Binary: 1100.
- Hexadecimal: C.
| Digit | Place |
|---|---|
| 1 | tens |
| 2 | ones |
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Frequently asked questions
How do you write 12 in words?
12 in words is "twelve".
How do you spell 12?
12 is spelled "twelve".
How do you write 12 on a check?
On a check, write "Twelve and 00/100".