A free number to words converter for English: spell out any figure plain, as an amount with cents, or in the format a check needs. Instant, and it never leaves your browser.
Check format sets its own capitalisation: banks expect Title Case, so the option is fixed here.
Type a number to see it spelled out. Pick a currency for an amount with cents, or Check to get the line a bank expects.
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01 · what it is
A number to words converter turns a figure into the words that say it — 1,234 becomes "one thousand two hundred thirty-four" — applying the hyphens, the scale words and the spelling that written English expects.
That sounds mechanical until you try it by hand on a long figure. The hyphen belongs between the tens and the units but not after the hundreds. The scale words stay singular. "Forty" drops the "u" that "four" and "fourteen" keep. And on a check the cents are not words at all. None of these is difficult; all of them are easy to get wrong at speed, which is exactly when amounts get written.
A number to words converter exists because the moments when you need a figure spelled out are usually the moments that matter: a check, a contract, an invoice, a form that will be read by someone who was not in the room. The written words are the version that counts, and this converter writes the amount in words the way those documents expect.
02 · why it matters
Look at a check, a promissory note or the payment clause of a contract and the amount appears two ways: once in figures, once in words. That second version is the reason a number to words converter is worth having open while you fill the document in. The reason is not ceremony. A figure can be altered with a single stroke — a 1 becomes a 4, a 3 becomes an 8, and a zero can be appended to the end. Words resist all three. Rewriting "one thousand" as "ten thousand" means forging an entire phrase in someone else's handwriting.
That is why, when the two versions disagree, the written words are the ones that prevail. It is a long-standing rule of negotiable instruments, and it has a practical consequence most people never think about: the words are the real amount. The figures are a convenience for whoever reads the document quickly.
It follows that a typo in the words is not a cosmetic problem. Writing "fourty" or leaving out a hyphen will not usually void anything, but writing "one thousand" when you meant "ten thousand" hands the other side an argument. Getting the words right is the cheapest insurance in the document.
03 · how to use it
The number to words converter is at the top of the page and needs no account. If you only want the plain answer, the defaults already give it to you.
01
Digits, with or without commas. A dot is the decimal point and a comma is a thousands separator, so 1,234.56 and 1234.56 both work.
02
Number spells the figure on its own. The currency modes add the unit and the cents. Check gives you the line a bank expects.
03
Lowercase for running text, UPPERCASE for forms that ask for it, Title Case for headings. Check mode sets its own.
04
One button. Nothing is sent anywhere: the conversion runs inside your browser.
04 · the rules
English has no academy setting the rules the way Spanish has the RAE. What it has instead is a set of conventions that style guides record and everyone follows. These four cover almost every number you will write, and they are the rules this number to words converter applies.
▸ hyphens
Twenty-one through ninety-nine take a hyphen. Above that the hyphen stops: "one hundred twenty-one", not "one-hundred-twenty-one".
▸ singular scales
Hundred, thousand, million and billion never take an "s" after a number. Two million, not two millions.
▸ short scale
A billion is a thousand million, 10⁹. Britain once used the long scale, where it meant 10¹², but has followed the short scale in official use for decades.
▸ forty
Four, fourteen and fourth keep the "u". Forty drops it. There is no reasoning to remember, only the spelling.
| Figure | In words | Why |
|---|---|---|
| 21 | twenty-one | Hyphen between tens and units. |
| 40 | forty | No "u" — the most common misspelling. |
| 123 | one hundred twenty-three | American usage: no "and". |
| 1,234 | one thousand two hundred thirty-four | Groups of three, read left to right. |
| 1,000,000 | one million | Scale words never take an "s". |
| 1,234,567 | one million two hundred thirty-four thousand five hundred sixty-seven | Each group carries its own scale word. |
| 3.14 | three point one four | Decimals are read digit by digit. |
| $123.45 | one hundred twenty-three dollars and forty-five cents | Currency mode reads the cents. |
05 · the "and"
Both are correct. The difference is which side of the Atlantic you are on. American usage drops the conjunction — one hundred twenty-three — while British usage keeps it — one hundred and twenty-three. Neither is a mistake, and no style guide on either side calls the other one wrong. This converter follows American usage; in a British document, add the "and" after the hundreds.
Where it stops being a matter of taste is on a check, and this is the part almost nobody is told.
Two different "and"s
On a check, the "and" has a job: it separates the dollars from the cents. One Hundred Twenty-Three and 45/100 means 123 dollars and 45 cents. That "and" is structural, not stylistic.
So if you also write the British "and" after the hundreds, the line ends up with two of them — "One Hundred and Twenty-Three and 45/100" — and the sentence stops making it obvious where the dollars end. It is not illegal and no bank will bounce it for that alone, but on a document whose whole purpose is to be unambiguous, it is worth avoiding.
The practical rule: in running prose, use whichever convention matches your audience. On a check, keep a single "and" and let it do its real job.
06 · on a check
The amount row on a check has its own format, and the Check mode above produces it exactly: Title Case words, then the cents as a fraction over one hundred. One Hundred Twenty-Three and 45/100.
Three things about that line surprise people. The word "Dollars" is missing because it is already printed at the end of the row. The cents are a fraction rather than words because a fraction is far harder to alter and stays legible in bad handwriting. And a whole amount still needs the fraction — Five Hundred and 00/100 — because an empty cents position is an invitation to fill it in.
For the same reason, whatever space is left after the words gets a line drawn through it. The blank is the vulnerability, not the amount.
Checks are used far less than they were, but they have not disappeared from rent, contractor payments or anything involving a title company — and the format has not changed at all. It is the one place where converting numbers to words is not a convenience but a requirement.
07 · mistakes
None of these will get a document rejected on its own. All of them make it look careless, and the last one can cost money.
— twenty one
+ twenty-one
Every compound number from twenty-one to ninety-nine takes a hyphen. It is the single most frequent error in written amounts.
— fourty
+ forty
Four, fourteen and fourth all keep the "u". Forty does not. There is no rule behind it — the spelling simply settled that way.
— two millions
+ two million
Hundred, thousand, million and billion stay singular after a number. The "s" only appears in vague quantities: "millions of people".
— One Hundred and Twenty-Three and 45/100
+ One Hundred Twenty-Three and 45/100
Two "and"s on a check line is confusing. The one that belongs there separates the dollars from the cents.
— Leaving the amount line short
+ Filling the empty space with a line
A gap after the written amount is where a figure can be added later. Draw a line through whatever space is left.
08 · questions
Q01
Yes, with no usage limit and no sign-up. Convert as many numbers as you need, close the page and come back tomorrow. There is no paid tier and no feature held back.
Q02
No. The conversion runs inside your browser with plain JavaScript, and nothing is transmitted or stored. That matters when the number is an amount on a contract or an invoice you have not signed yet.
Q03
Both are correct, in different places. American usage leaves out the "and": one hundred twenty-three. British usage puts it in: one hundred and twenty-three. This converter follows American usage, which is also what the check format below assumes. In a British context, add the "and" after the hundreds.
Q04
It depends on the style guide you follow. The Chicago Manual of Style spells out whole numbers from zero through one hundred; the AP Stylebook spells out one through nine and uses figures from 10 up. In legal and financial documents the rule is different again: the amount appears both ways, and the written words prevail if the two disagree.
Q05
Up to fifteen digits, which reaches into the hundreds of trillions, plus a decimal part. English here uses the short scale, so a billion is a thousand million (10⁹). That matters when converting from Spanish, where "billón" means a million million (10¹²) — a thousand times more.
Q06
It returns the exact line a bank expects on the amount row: Title Case words, then the cents as a fraction over one hundred, as in "One Hundred Twenty-Three and 45/100". The word "Dollars" is left out because it is already printed on the check.
Q07
Because that is the banking convention, and it exists to prevent tampering. A fraction over one hundred is much harder to alter than the words "forty-five cents", and it makes the figure unmistakable even in poor handwriting.
Q08
Yes, on the words to numbers page. It is the tool for checking an amount you received rather than one you are writing, and it handles the cases that trip converters up: the British "and", check lines with the cents over one hundred, and currency words.
Type the figure, pick the mode, copy the words. On anything that will be read by someone else — a check, an invoice, a contract — the amount in words is the one that counts, so it is worth the extra few seconds. The number to words converter stays free and needs no sign-up, so come back whenever a document asks for it. Everything else on the site is below.
Back to the converter →reverse
Words to numbers
check what someone wrote
checks
Writing a check
the amount line, field by field
usd
Dollars in words
sentence and check form
gbp
Pounds in words
and the British cheque line
eur
Euros in words
euro or euros
ordinals
Ordinal numbers
1st, 2nd, 3rd
fractions
Fractions in words
one half, three quarters
decimals
Decimals in words
three point one four
dates
Date in words
American and British
time
Time in words
half past, quarter to
percent
Percentage in words
and percentage points
roman
Roman numerals
both ways
excel
Number to words in Excel
macro, LAMBDA, Sheets
word
Number to words in Word
the built-in field
text
Word counter
words, characters, reading time
text
Title case converter
AP and Chicago
security
Password generator
with the entropy in bits
This site also converts numbers in Spanish and Portuguese, each with its own rules — Spanish uses the long scale, where a "billón" is a million million.