This number-to-words converter spells out any figure in Spanish or English, regardless of the language you're browsing the page in. It handles very large whole numbers (into the trillions), decimals, and, in currency mode, check-style amounts with cents, in the currency you choose: US dollars, euros, British pounds, or Latin American currencies such as Mexican, Colombian, Argentine or Chilean pesos.
It takes care of the grammar that trips up most converters: “twenty-one thousand”, “one hundred one”, and, on the Spanish side, “un millón” (not “uno millón”), “veintiún mil” (not “veintiuno mil”) and “mil” without “un” in front by default.
How to use
- 1Type the number or amount, using a comma or dot if it has decimals.
- 2Choose the result language (Spanish or English), regardless of the page's language.
- 3For an amount, turn on “Currency amount”, pick the currency and whether cents show as a fraction or in words.
- 4Copy the result in uppercase, lowercase or sentence case, ready for a check, invoice or promissory note.
What you can do
- Whole numbers and decimals up to trillions
- Currency format with cents
- English and Spanish output
- Upper or lower case
How decimals are read
In English, each decimal digit is read separately after “point”, like a phone number (for example, 1234.50 reads “one thousand two hundred thirty-four point five zero”). In Spanish, the decimal part is read as a named fraction: two digits read as “centésimas” (hundredths), one as “décimas” (tenths) and three as “milésimas” (thousandths).
Currency amounts for checks and invoices
In currency mode, the number becomes check- or invoice-ready text, with the chosen currency's name and the cents either as a fraction (“and 75/100”) or spelled out (“and seventy-five cents”), whichever you prefer. You can choose between US dollars, euros and British pounds, or several Latin American currencies when the result is in Spanish.
Very large numbers: millions, billions and trillions
English uses the short scale, where a billion is 10⁹ and a trillion is 10¹². Spanish uses the long scale, where “billón” is 10¹² and “mil millones” (not “billón”) is 10⁹. This converter respects that difference so the result is always grammatically correct in each language, not a word-for-word translation.
Frequently asked questions
How do you write 1,000,000 in words?
In English, “one million”. In Spanish, “un millón” (with “un”, not “uno”).
How do you write a check with cents?
Turn on “Currency amount” and choose whether you want the cents as a fraction (for example, “and 75/100”) or spelled out (“and seventy-five cents”), depending on the format your bank or country expects.
What's the difference between a billion in English and “billón” in Spanish?
In English, a billion is a thousand million (10⁹). In Spanish, “billón” means a million million (10¹²); the Spanish word for 10⁹ is “mil millones”. This converter uses the correct scale for each language.
Does it convert negative numbers?
Yes, type a minus sign before the number and the result will start with “negative” in English or “menos” in Spanish.
Can I get the result in Spanish while browsing the English site?
Yes. The result language is chosen separately from the site's language, so you can get a Spanish result on the English site and vice versa.