Writing Numbers Out in Full
Numbers get written as words when the digits alone are not enough: on a cheque, where words are harder to alter than figures; in a contract, where "one hundred thousand (100,000)" removes any doubt about a misplaced comma; in formal prose, where style guides ask for it below a certain threshold.
This converter spells a number out, handling the awkward parts, hyphenation, the word "and", and the scale names above a thousand.
How to Convert Numbers to Words
Type the figure and read the words; the conventions below explain why the output looks as it does.
- Enter the number in digits. Separators are ignored, so 1,000,000 and 1000000 give the same result.
- Read the spelled-out form. Numbers from 21 to 99 are hyphenated, so 42 is forty-two rather than forty two.
- For cheque writing, use the words for the whole amount and figures for the cents, which is the standard convention.
- Note that British usage inserts "and" before the final part, one hundred and five, while American usage generally omits it.
- For very large values, check the scale name against the table below, since billion and trillion have not always meant the same thing everywhere.
Where the Conventions Disagree
The "and" is the most visible difference between British and American practice. British English writes one hundred and twenty-three; American English writes one hundred twenty-three. Neither is wrong, but mixing them within a document looks careless, and cheque wording in particular tends to follow local banking convention.
Where the number sits in a sentence also affects the convention. Most style guides ask that a sentence never open with a figure, so a paragraph beginning with a year is rewritten rather than written as digits. That rule is the reason you see "Nineteen ninety-nine was" rather than "1999 was" at the start of a line in edited prose.
Hyphenation is more consistent: compound numbers from twenty-one to ninety-nine take a hyphen, and that rule holds inside larger numbers too, so 1,342 is one thousand three hundred and forty-two. Fractions written as words are also hyphenated when they act as modifiers, a two-thirds majority, which is a separate rule that catches people out.
Scale Names
The short scale, used in English today, against the long scale still used in much of Europe.
| Digits | Short scale (English) | Long scale (parts of Europe) |
|---|---|---|
| 1,000 | thousand | thousand |
| 1,000,000 | million | million |
| 10⁹ | billion | milliard / thousand million |
| 10¹² | trillion | billion |
| 10¹⁵ | quadrillion | billiard / thousand billion |
| 10¹⁸ | quintillion | trillion |
This is a genuine trap in translation and finance: a European billion may mean a million million rather than a thousand million. British English switched to the short scale officially in 1974, but the older meaning still appears in historical documents.
Cheques, Contracts and Ambiguity
Words on a cheque exist because they are hard to alter. A figure can gain a digit or a zero with a pen stroke; a written amount cannot be extended without it being obvious. When the words and the figures disagree, banking practice in most countries treats the written amount as authoritative, which is the reason the convention survives.
Contracts use both for the same reason, and the phrasing matters. Writing an amount as words followed by figures in brackets makes a transcription error visible rather than silent. It is worth checking that the two match before signing, since a discrepancy is exactly the kind of thing that gets litigated later.