311 in Words
How do you write 311 in words?
The number 311 is written three hundred eleven in words. As an ordinal it is three hundred eleventh, and on a check you would write Three hundred eleven and 00/100.
Last updated 24 August 2026
Other ways to write it
| Cardinal | three hundred eleven |
|---|---|
| Ordinal | three hundred eleventh |
| Currency | three hundred eleven dollars |
| Check format | Three hundred eleven and 00/100 |
How 311 is written
311 is the sum of its place values, 300 + 10 + 1, and is written three hundred eleven.
Its ordinal form is three hundred eleventh — only the final element takes the ordinal ending — and on a check the amount line reads "Three hundred eleven 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 eleven, never ten one.
For house-style rules on spelling out numbers, see the Chicago Manual of Style.
Facts about 311
- 311 is an odd number.
- It is a prime number.
- Digit sum: 5.
- Roman numerals: CCCXI.
- Binary: 100110111.
- Hexadecimal: 137.
| Digit | Place |
|---|---|
| 3 | hundreds |
| 1 | tens |
| 1 | ones |
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Frequently asked questions
How do you write 311 in words?
311 in words is "three hundred eleven".
How do you spell 311?
311 is spelled "three hundred eleven".
How do you write 311 on a check?
On a check, write "Three hundred eleven and 00/100".