1 in Words – How to Spell 1
1 = One
1 is written “one” in English.
Step by step
- Split 1 into groups of three digits: 1.
- Write each group as hundreds, tens and ones, hyphenating 21–99.
- Join the groups: One.
As an ordinal (for dates, rankings and anniversaries), 1 becomes “first”, abbreviated 1st.
Details
- In words
- One
- For a check
- One and 00/100 dollars
- Uppercase
- ONE
- Digits
- 1
- Roman numerals
- I
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 1?
One.
How do I write 1 dollars on a check?
One and 00/100 dollars.
Is there a hyphen in 1?
No — this number has no compound tens-and-ones part.
What is 1 in Roman numerals?
I.