Number to Words Converter

What this tool does

Type in a number and it spells the whole thing out in English — as a plain cardinal number ("one thousand two hundred thirty-four"), an ordinal ("one thousand two hundred thirty-fourth"), or a formatted currency amount ready for a check ("One thousand two hundred thirty-four and 56/100 Dollars"). It handles negative numbers, decimals, and numbers up into the sextillions (21 digits), so it works for everything from a homework problem to a six-figure invoice.

Who it's for

Anyone who's ever had to write a check by hand and blanked on how to spell "$4,205.60," accountants and bookkeepers formatting legal documents, students learning number names, and developers who need a quick reference while building their own amount-to-words logic.

How to use it

• Type or paste a number — commas are fine, decimals are fine, negative signs are fine.
• Pick a mode: Cardinal for a plain number, Currency for a dollar-and-cents amount, or Ordinal for "1st, 2nd, 3rd" style.
• In Currency mode, choose the currency (USD, EUR, GBP, INR, CAD, AUD, or JPY) and, if you're writing a check, turn on "Check-writing format" to get the XX/100 fraction and the trailing "only."
• Switch letter case (Sentence case, Title Case, UPPERCASE, or lowercase) and hit Copy to grab the result.

Real-world uses

Filling in the "amount in words" line on a paper check or bank draft, writing out a dollar figure in a legal contract or affidavit so it can't be altered, double-checking an invoice total, or spelling out a place ("103rd") in a document.

Frequently asked questions

How do banks expect a check amount to be written?

Most banks want the whole-dollar amount spelled out in words, followed by "and," then the cents written as a fraction over 100 — for example, "Two hundred fifty and 00/100." Turn on Check-writing format and this tool produces exactly that.

What's the difference between British and American style?

American English usually skips "and" in numbers like "one hundred five," while British English includes it: "one hundred and five." Toggle the British style option to switch between the two.

Can it convert numbers back from words into digits?

No — this tool goes one direction only, digits to words, since that's the direction almost every real use case (checks, legal documents, invoices) actually needs.

How large a number can it handle?

Up to 21 digits, which covers everything through the sextillions. Numbers that size are rare outside of scientific notation, but the tool won't choke on them.

Does it support currencies other than the US dollar?

Yes — Euro, British Pound, Indian Rupee, Canadian Dollar, Australian Dollar, and Japanese Yen (which has no minor/cent unit, so it's spelled out as a whole amount only).