Number to words
Type digits, read English. UK and US conventions both covered, and a currency mode for writing amounts in full.
Guide
How to use it
- Type the number, commas welcome, up to 999 trillion.
- Pick the style: UK inserts "and" (one hundred and five), US omits it (one hundred five).
- Decimals read digit by digit ("point five zero"), or switch on currency mode to get pounds and pence.
- Copy the words with the button.
Examples
Conventions, settled
UK: one hundred and five. US: one hundred five. Both are correct in their homes, mixing them is what reads oddly, this tool keeps you on one side.
As a number: one thousand, two hundred and fifty point five zero. As currency: one thousand, two hundred and fifty pounds and fifty pence. The mode toggle is the difference.
Nine hundred and ninety-nine trillion (and the rest), the tool’s ceiling. Beyond that, scientific notation is kinder to everyone.
Method
How it works
Numbers split into three-digit groups, each rendered with hundreds, tens and teens, then joined with scale words (thousand, million, billion, trillion, short scale, the modern UK and US standard). UK style adds "and" after hundreds and before a final small group: "one thousand and five".
Hyphenation follows convention: twenty-one through ninety-nine hyphenate. Style guides differ on commas between groups, this tool includes them for readability.
FAQ
Frequently asked questions
Is a billion a thousand million here?
Yes, short scale, the official UK usage since 1974 and always the US usage. The old British long-scale billion (a million million) survives only in historical texts.
When do I write numbers as words at all?
Most style guides spell out one to nine (or one to ten) in prose and use digits from 10 up, plus words for any number starting a sentence. Cheques and legal documents want words regardless, that is the currency mode’s job.
Why does UK style add "and"?
Convention, not logic: British English marks the boundary between hundreds and the remainder. American style dropped it, teachers on each side mark the other wrong, an ocean is involved.
How are decimals read?
Digit by digit after "point" (three point one four), the mathematical convention. "And a half" style readings are conversational, not written form.
Does it do ordinals (first, second, third)?
Yes, whole numbers show an ordinal line below the main result.
Negative numbers?
Type the digits and say "minus" yourself, the tool keeps to the unsigned number, which is what documents want written out.
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