80 in Words
How do you write 80 in words?
The number 80 is written eighty in words. As an ordinal it is eightieth, and on a check you would write Eighty and 00/100.
Last updated 19 June 2026
Other ways to write it
| Cardinal | eighty |
|---|---|
| Ordinal | eightieth |
| Currency | eighty dollars |
| Check format | Eighty and 00/100 |
How number-to-words spelling works
A cardinal number names a quantity (eighty), while an ordinal names a position (eightieth). 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 80
- 80 is an even number.
- It is not a prime number.
- Digit sum: 8.
- Roman numerals: LXXX.
- Binary: 1010000.
- Hexadecimal: 50.
| Digit | Place |
|---|---|
| 8 | tens |
| 0 | ones |
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Frequently asked questions
How do you write 80 in words?
80 in words is "eighty".
How do you spell 80?
80 is spelled "eighty".
How do you write 80 on a check?
On a check, write "Eighty and 00/100".