How large a number can it handle?

It uses arbitrary-precision integers, so it handles numbers up to the quintillions for the words output. The named scales are thousand, million, billion, trillion, quadrillion and quintillion.

Does it use the short scale or long scale?

It uses the short scale common in modern British and American English, where a billion is a thousand million (1,000,000,000).

Can it handle negative numbers?

Yes. A leading minus sign produces "negative …", and the words "negative" or "minus" at the start of a phrase parse back to a negative number.

What about the word \"and\"?

The word "and" is ignored when parsing, so "one hundred and five" and "one hundred five" both yield 105. This matches how the number is read aloud in British English.

Does it support decimals or currency?

No. This converter works with whole integers only. For cheque or invoice amounts, convert the whole-number part and add the decimal portion separately.

Number to Words Converter

What this tool does

This converter works in both directions: type a number like 1234567 and read it as “one million two hundred thirty-four thousand five hundred sixty-seven”, or type a phrase like “two thousand twenty six” and get 2026 back. It is handy for writing cheque amounts, spelling out figures in legal or formal documents, and checking how a large number reads aloud. Everything runs in your browser.

How it works

For the number-to-words direction, the integer is split into groups of three digits from the right. Each group is converted independently — hundreds, then a tens-and-units part using the standard English words — and then labelled with its scale name:

1 234 567
  -> 1 "million"
  -> 234 "thousand"
  -> 567
  = one million two hundred thirty-four thousand five hundred sixty-seven

Groups equal to zero are skipped, and a negative sign produces a leading “negative”. For the words-to-number direction, the text is tokenised and each token either adds a small value (one to ninety-nine), multiplies the current group by a hundred, or flushes the accumulated group against a magnitude word (thousand, million, and so on) into the running total. The word “and” is ignored. Arbitrary-precision integers are used so very large values stay exact.

Example and notes

“forty-two” parses to 42, “one million two hundred thousand” parses to 1200000, and “negative twenty three” parses to -23. Because magnitude words drive the grouping, “one hundred and five” correctly yields 105. The tool handles whole integers only — it does not parse decimals, fractions, or currency symbols, so split those parts out yourself. Both fields update live as you type, with nothing sent to a server.