Number to Words Converter
Convert numbers to English words instantly
Type any number and instantly read it in English words — from single digits up to hundreds of trillions, including negatives and two-digit decimals. It is handy for writing checks, legal documents, invoices, or learning how large English numbers are pronounced. Everything runs locally in your browser.
How to Use
- Enter a number: Type or paste an integer (up to 15 digits) with an optional decimal part of up to two digits.
- Read the words: The English words appear instantly as you type — no button to press.
- Copy the result: Click copy to send the words to your clipboard.
Features
- Cardinal English words for integers up to 999,999,999,999,999
- Supports negative numbers (“negative forty-two”)
- Decimal part spoken digit by digit (“point five”, “point zero five”)
- American style without “and” inside hundreds
- Instant conversion as you type, one-click copy
- Works entirely in your browser — no data is uploaded
How English Number Words Work
English builds large numbers in groups of three digits. Each group gets a scale word — thousand, million, billion, trillion — and within a group the rules repeat: hundreds first, then tens and ones, with a hyphen between them (twenty-one, ninety-nine). Teens are irregular (eleven through nineteen), which is why they trip up learners. This converter applies those rules consistently: 1,234,567 becomes “one million two hundred thirty-four thousand five hundred sixty-seven”.
Use Cases
- Finance: Write out check amounts and invoice totals in words, as many banks require.
- Legal documents: Spell out sums in contracts to prevent alteration.
- Education: Help students learn how large English numbers are read aloud.
- Accessibility: Turn figures into text that screen readers and TTS tools pronounce correctly.
Tips
Keep decimals to two digits — extra digits are rejected, which matches how monetary amounts are normally written. If you need the number in a different base instead of words, try the Number Base Converter; for the reverse style of notation, the Roman Numeral Converter covers 1–3999.
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Frequently Asked Questions
What is the largest number this converter supports?
The converter handles integers up to 999,999,999,999,999 — just under one quadrillion — plus an optional decimal part of up to two digits. That covers trillions, billions, millions, and everything below.
How are decimal numbers written out?
The decimal part is spoken digit by digit after the word "point". For example, 3.5 becomes "three point five" and 12.05 becomes "twelve point zero five". A trailing zero is dropped, so 1.20 reads as "one point two".
Can I convert negative numbers?
Yes. Negative numbers are prefixed with the word "negative", so -42 becomes "negative forty-two" and -0.75 becomes "negative zero point seven five".
Does the output use "and" like in British English?
No. The converter follows American English style without "and" inside hundreds: 123 is written as "one hundred twenty-three", not "one hundred and twenty-three".
The site is also available in Chinese and German — does the output change language?
No. The words output is always in English, even when you use the Chinese or German interface. Only the page text (labels, buttons, headings) is translated.
Is my input sent to a server?
No. The conversion runs entirely in your browser with a small JavaScript library. Nothing you type is uploaded or stored.