100 in Words
How do you write 100 in words?
The number 100 is written one hundred in words. As an ordinal it is one hundredth, and on a check you would write One hundred and 00/100.
Last updated 19 June 2026
Other ways to write it
| Cardinal | one hundred |
|---|---|
| Ordinal | one hundredth |
| Currency | one hundred dollars |
| Check format | One hundred and 00/100 |
How number-to-words spelling works
A cardinal number names a quantity (one hundred), while an ordinal names a position (one hundredth). 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 100
- 100 is an even number.
- It is not a prime number.
- Digit sum: 1.
- Roman numerals: C.
- Binary: 1100100.
- Hexadecimal: 64.
| Digit | Place |
|---|---|
| 1 | hundreds |
| 0 | tens |
| 0 | ones |
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Frequently asked questions
How do you write 100 in words?
100 in words is "one hundred".
How do you spell 100?
100 is spelled "one hundred".
How do you write 100 on a check?
On a check, write "One hundred and 00/100".