18 in Words – How to Spell 18
18 = Eighteen
18 is written “eighteen” in English.
Step by step
- Split 18 into groups of three digits: 18.
- Write each group as hundreds, tens and ones, hyphenating 21–99.
- Join the groups: Eighteen.
As an ordinal (for dates, rankings and anniversaries), 18 becomes “eighteenth”, abbreviated 18th.
Details
- In words
- Eighteen
- For a check
- Eighteen and 00/100 dollars
- Uppercase
- EIGHTEEN
- Digits
- 2
- Roman numerals
- XVIII
How it works
English numbers are read in groups of three digits — ones, thousands, millions and so on. Each group is spoken as hundreds, tens and units, compound numbers from twenty-one to ninety-nine take a hyphen, and in American usage the word “and” is saved for the decimal point. On a check, the cents follow as a fraction over 100.
Nearby values
Related conversions
Frequently asked questions
How do you spell 18?
Eighteen.
How do I write 18 dollars on a check?
Eighteen and 00/100 dollars.
Is there a hyphen in 18?
No — this number has no compound tens-and-ones part.
What is 18 in Roman numerals?
XVIII.