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 24 August 2026
Other ways to write it
| Cardinal | one hundred |
|---|---|
| Ordinal | one hundredth |
| Currency | one hundred dollars |
| Check format | One hundred and 00/100 |
How 100 is written
100 occupies one place value, 100 in the hundreds place, and is written one hundred.
Its ordinal form is one hundredth — only the final element takes the ordinal ending — and on a check the amount line reads "One hundred and 00/100", where 00/100 stands for zero cents.
For house-style rules on spelling out numbers, see the Chicago Manual of Style.
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".