340 in Words
How do you write 340 in words?
The number 340 is written three hundred forty in words. As an ordinal it is three hundred fortieth, and on a check you would write Three hundred forty and 00/100.
Last updated 19 June 2026
Other ways to write it
| Cardinal | three hundred forty |
|---|---|
| Ordinal | three hundred fortieth |
| Currency | three hundred forty dollars |
| Check format | Three hundred forty and 00/100 |
How number-to-words spelling works
A cardinal number names a quantity (three hundred forty), while an ordinal names a position (three hundred fortieth). English hyphenates compound numbers from twenty-one to ninety-nine and groups digits into thousands, millions, and billions.
For house-style rules on spelling out numbers, see the Chicago Manual of Style, or read our guide to spelling numbers in words.
Facts about 340
- 340 is an even number.
- It is not a prime number.
- Digit sum: 7.
- Roman numerals: CCCXL.
- Binary: 101010100.
- Hexadecimal: 154.
| Digit | Place |
|---|---|
| 3 | hundreds |
| 4 | tens |
| 0 | ones |
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Frequently asked questions
How do you write 340 in words?
340 in words is "three hundred forty".
How do you spell 340?
340 is spelled "three hundred forty".
How do you write 340 on a check?
On a check, write "Three hundred forty and 00/100".