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 24 August 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 340 is written
340 is the sum of its place values, 300 + 40, and is written three hundred forty.
Its ordinal form is three hundred fortieth — only the final element takes the ordinal ending — and on a check the amount line reads "Three hundred forty and 00/100", where 00/100 stands for zero cents.
British English inserts "and" before the last part, giving three hundred and forty, where American English writes three hundred forty without it.
Its Roman numeral CCCXL uses subtractive notation: XL means 40, written as X before L instead of repeating X.
For house-style rules on spelling out numbers, see the Chicago Manual of Style.
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".