Number to Words

How to use

1. Type the amount, using the grouping your language writes.
2. Choose the language it should be read in — the two follow different rules, not different words.
3. Add a currency when the words are going on an invoice.
4. Copy the line straight into the document.

Features

• Vietnamese sound changes applied properly: mười lăm, hai mươi mốt, một trăm linh năm.
• English hyphenation where it belongs: twenty-one, not twenty one.
• Amounts up to the thousand-billion scale.
• Currency wording, including “đồng chẵn” for a whole amount and dollars-and-cents for a fractional one.
• Runs entirely in your browser.

Frequently asked questions

Why does 1.500 mean different things in the two languages?

Because the separators are reversed. English writes 1,500 for fifteen hundred and 1.500 for one and a half; Vietnamese writes 1.500 for fifteen hundred and 1,500 for one and a half. The tool follows whichever language you are reading in, which is why the hint under the field changes with it. Guessing from the digits alone gets this wrong on exactly the amounts that matter.

Why “ba mươi tư” rather than “ba mươi bốn”?

Both are correct Vietnamese and both are heard daily. Invoices are conventionally written with tư, along with mốt for one and lăm for five after a tens word, so that is the form used here — consistently, which matters more than the choice itself when the text is going into a document.

What is “chẵn” for?

It marks a whole amount on a Vietnamese invoice: nothing follows the đồng, so nobody can add to the line later. It appears only when the amount has no fractional part.

Does it write cents?

For US dollars, yes: 123.45 reads as one hundred twenty-three dollars and forty-five cents, with the cents read as their own number rather than as digits after a point. Vietnamese đồng has no minor unit in practice, so a fractional amount is read with phẩy.

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