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.