Number to Words — Spell Out Numbers for Checks & Legal
Convert numbers into English words instantly. Perfect for writing checks, legal documents, or formal invitations. Supports currency formatting and decimals.
Two conventions cause most of the errors people are trying to avoid. On a cheque, the word 'and' marks the decimal point, so 1,250.75 is 'one thousand two hundred fifty and 75/100', and using 'and' anywhere else is what invites a bank to query it. And short scale versus long scale changes what a billion means: it is a thousand million in English-speaking countries and a million million in much of continental Europe, which is a factor of a thousand hiding in a single word. The tool uses short scale.
How to use Number to Words
- Enter a number — Type any number (whole or decimal) in the input field.
- Select currency mode — Choose USD ($), EUR (€), GBP (£), or plain number mode, and show cents as a check-style fraction (45/100) or in words.
- View the word form — See your number instantly converted to English words, including check-writing format with cents notation.
- Copy the result — Click Copy to use the word form in your check, legal document, invoice, or formal correspondence.
Features
- Check format — Includes "and XX/100" notation.
- Currency support — USD, EUR, GBP.
- Large numbers — Supports up to trillions.
Frequently Asked Questions
How do I write a check amount with cents correctly?
On a standard US bank check, you write the full dollar amount in text, followed by the word "and", and then the exact cents written as a fraction out of 100. For example, a check for $1,234.56 should be written as: "One Thousand Two Hundred Thirty-Four and 56/100". It is also best practice to draw a horizontal line from the end of the fraction to the edge of the paper to prevent fraudsters from adding extra words.
Do I say "and" when reading a number out loud?
Grammatically, in formal American English, the word "and" is only used to denote a decimal point (or fractions/cents). You should say "One hundred fifty" not "One hundred and fifty." However, in British English, it is standard to include the "and" (e.g., "One hundred and fifty"). Our tool generates the grammatically correct American standard by default.
What is the highest number this tool can convert?
Our tool safely converts extremely huge numbers up to the standard JavaScript safe integer limit (`9,007,199,254,740,991`), which is Nine Quadrillion, Seven Trillion, One Hundred Ninety-Nine Billion, Two Hundred Fifty-Four Million, Seven Hundred Forty Thousand, Nine Hundred Ninety-One. Anything larger than that loses mathematical precision in standard web browsers.
Where does 'and' belong when writing an amount?
In American cheque convention, only at the decimal point: 'one thousand two hundred fifty and 75/100'. British usage puts 'and' before the tens in a spoken number too — 'one hundred and fifty'. For financial documents, follow the convention of the institution receiving it, and keep the numeric and written amounts identical.
Does 'billion' mean the same thing everywhere?
No, and this is a genuine source of error in translated documents. Short scale, used in English, makes a billion a thousand million. Long scale, still used in parts of continental Europe and Latin America, makes it a million million. This tool uses short scale. For cross-border contracts, write the figure in digits as well.