1,000,000,000 in Words – How to Spell 1,000,000,000
1,000,000,000 = One billion
1,000,000,000 is written “one billion” in English.
Step by step
- Split 1,000,000,000 into groups of three digits: 1 billion.
- Write each group as hundreds, tens and ones, hyphenating 21–99.
- Join the groups: One billion.
As an ordinal (for dates, rankings and anniversaries), 1,000,000,000 becomes “one billionth”, abbreviated 1,000,000,000th.
Details
- In words
- One billion
- For a check
- One billion and 00/100 dollars
- Uppercase
- ONE BILLION
- Digits
- 10
- Roman numerals
- Above 3,999
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
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Frequently asked questions
How do you spell 1,000,000,000?
One billion.
How do I write 1,000,000,000 dollars on a check?
One billion and 00/100 dollars.
Is there a hyphen in 1,000,000,000?
No — this number has no compound tens-and-ones part.
What is 1,000,000,000 in Roman numerals?
Standard Roman numerals stop at 3,999.