Number to words
Spell out any number in words, error-free.
- Instant
- Free
- Private (processed locally)
- No sign-up
Spell out numbers without second-guessing
Cheques, deeds, contracts, invitations: whenever an amount must be tamper-proof or formal, it gets written in words. This tool applies the conventions automatically, from zero to 999 billion, hyphens included.
The rules at a glance
| Number | In words |
|---|---|
| 21 | twenty-one (hyphen in compound tens) |
| 123 | one hundred twenty-three (no “and”, US style) |
| 1,000 | one thousand |
| 1,000,000 | one million |
| 1,000,000,000 | one billion (short scale, 10⁹) |
British usage adds “and” after hundreds (“one hundred and twenty-three”) — both forms are correct; consistency is what matters.
On a cheque, the amount in words generally prevails over the digits when they differ — worth getting right.
Frequently asked questions
How do I write an amount in words on a cheque?
Write the sum in words on the dedicated line, followed by the currency, and strike through any remaining space. Example: “one thousand two hundred thirty-four dollars”. When digits and words differ, the amount in words generally prevails.
Which spelling conventions does the tool apply?
Standard English: hyphens only inside compound tens (“twenty-one”, “ninety-nine”), spaces elsewhere, no “and” (US convention: “one hundred twenty-three”).
Should I write “and” after hundred?
British English commonly inserts it (“one hundred and twenty-three”); American English omits it. Both are understood everywhere — pick the convention of your audience and stay consistent.
What is the difference between billion systems?
This tool uses the short scale common to modern English: one billion = 1,000,000,000 (10⁹). The old British “long scale” billion (10¹²) is no longer in official use.
How large a number can I convert?
Up to 999,999,999,999 (just under one trillion), negative numbers included. For larger figures, split them or use scientific notation.