🔢 Number to Words Converter
Convert any figure into Spanish words: ideal for invoices, checks, contracts and legal documents. Supports decimals and currency.
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Examples
0cero
21veintiuno
1234mil doscientos treinta y cuatro
1.000.000un millón
Frequently asked questions
How are numbers written in words per the RAE?
From 0 to 29 they are written as a single word (dieciséis, veintidós); from 31 on they are separated (treinta y uno). 100 alone is "cien", "ciento" when followed; 500, 700 and 900 are quinientos, setecientos and novecientos.
What is converting numbers to words for?
It is required on electronic invoices, checks, promissory notes and contracts in Mexico, Colombia and Spain as an anti-fraud measure: the written amount prevails over the figure.
What range of numbers is supported?
From 0 to 999 billion, with up to two decimals. Decimals are expressed as a fraction (e.g. "con 56/100").