Writing numbers in words for UK legal and financial documents
UK cheque writing follows a specific convention: "Five hundred and forty-two pounds and thirty pence", note the use of "and" before the pence amount, which is standard British English practice. This differs from American usage, which sometimes omits "and" between hundreds and tens. Companies House filings, solicitor documents, and HMRC forms all require amounts to be written in full where specified. This tool converts any number to its written form instantly.
UK-specific number writing rules
| Number | UK English | Note |
|---|---|---|
| 121 | one hundred and twenty-one | "and" after hundred is British standard |
| 1,000,000,000 | one billion | UK now uses short scale (109) since 1974 |
| 1st, 2nd, 3rd | first, second, third | Ordinals for contract clauses |
A note on "billion": the UK historically used the long scale (one billion = 1012), but the British government officially adopted the short scale in 1974. All modern UK financial and legal documents use billion to mean 109.
Fraud prevention and legal validity
Writing amounts in words on cheques and contracts serves as a fraud-prevention measure: if the numerical figure is altered, the written words remain as the legally binding version. In the UK, if the two amounts differ, the written words typically take precedence. This applies to bank cheques, promissory notes, and some contract schedules.
Ordinals and other uses
Beyond financial documents, written numbers appear in legal clause numbering ("the twenty-third day of June"), property descriptions, and accessible content for screen readers. See also Number Formatter for locale-specific digit formatting with thousand separators.