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Convert numbers to words for free
Turn a figure into words for a check, an invoice, a contract or a receipt: “one thousand two hundred fifty and 50/100 dollars”. It works in English and Spanish, up to 999,999,999,999,999 with two decimals, in lowercase, UPPERCASE or sentence case. It also converts Roman numerals both ways.
- Free with an account
- Spanish and English
- Checks and Roman numerals
- Type the amount
- Choose language and format
- Copy the text
HOW TO USE IT
Three steps.
Type the amount
Use digits with a decimal point or comma, for example 1250.50 or 1.250,50. Thousands separators are accepted.
Choose language and format
English or Spanish; no currency or dollars, euros or pesos; decimals in words or check style, and capitals if you need them.
Copy the text
Press “Copy result”. Further down, type a number or a Roman numeral to convert it to the other system.
NEXT STEP
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Numbers to words: common questions
How is a million written in words?
“One million”. In Spanish, when the amount ends exactly in millions and has a currency, «de» is added: «un millón de pesos», «dos mil millones de dólares». If more digits follow, it is not: «un millón cien mil pesos».
Is a billion the same in English and Spanish?
No. In English, a billion is a thousand millions (10^9). In Spanish, «un billón» is a million millions (10^12), which English calls a trillion. The tool uses each language’s own scale.
What is the 50/100 check style?
It is the usual way to write cents on checks and invoices: the whole amount in words and the cents as a fraction of 100. Each bank has its own habits; check the format yours asks for.
Which English style does it use?
US style: “one hundred five”, without “and” after “hundred”, and with a hyphen between tens and units, as in “twenty-one”.
Up to which Roman numeral does it convert?
From 1 to 3999 in the modern form, for example MMXXVI for 2026. Forms such as IIII or VX are rejected because they are not standard.
Is my text sent to a server?
No. Everything is calculated in your browser as you type; the text is not sent to Cocuyo or any third party and is not stored. You can check it in your browser’s network tools: your file is not sent.
Is it really free?
Yes. You can try it before signing up; to keep using it, we ask for a free account, with no subscription. It uses no credits and does not count toward your 30 welcome uses: it has no usage cap.
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