Number to Words Converter
Convert any number into its written form in English, Portuguese, or Spanish. Useful for writing checks, legal documents, or educational purposes.
Supports integers and decimals, negative numbers, and values up to quadrillions. Select the output language to get the correct spelling for your locale.
How it works
Numbers are broken into groups of three digits and converted using standard naming conventions for each language.
Use cases
- Writing checks or bank drafts that require amounts in words
- Filling out legal or financial documents
- Teaching number spelling in different languages
- Accessibility tools for reading numbers aloud
Frequently asked questions
How do I write a number in words on a check?
Write the dollar amount in words followed by the cents as a fraction over 100, for example 1,250.75 becomes One thousand two hundred fifty and 75/100. Type the number into this converter to get the written form instantly, then draw a line after the words to prevent alterations.
How does the converter turn a number into words?
The number is split into groups of three digits from the right — units, thousands, millions, and so on. Each group is spelled out (hundreds, tens, and ones) and joined with the appropriate scale word for the selected language. Decimals are read after the word point, or as cents in monetary contexts.
What is the difference between a billion in English and in other languages?
English uses the short scale, where a billion is a thousand million (10⁹). Many European usages of Spanish and Portuguese historically follow the long scale, where billón/bilhão can mean a million million (10¹²), although Brazilian Portuguese uses the short scale like English. This converter applies the standard convention for the output language you select.
Can I convert negative numbers and decimals to words?
Yes. Negative values are prefixed with the word minus (or its equivalent in the chosen language), and the decimal part is spelled out after the integer portion. The tool supports integers and decimals up to the quadrillions, which covers virtually all financial and legal documents.
Why do legal and financial documents require amounts in words?
Writing an amount in words makes it much harder to alter or misread than digits alone — adding a zero changes 100 to 1000, but one hundred cannot be changed so easily. When the digits and words disagree, many jurisdictions and banking practices treat the written words as the authoritative amount.