Forty or Fourty: Which Spelling Is Correct?

Forty is the correct spelling. Fourty is a common spelling mistake. The number 40 is always written as forty, not fourty, in standard English.

If you are writing the number 40, use forty.

• ✅ forty
• ❌ fourty

The confusion is easy to understand because four is spelled with a “u.” However, when the number changes to its tens form, the spelling becomes forty, not fourty.

Example:

• She is forty years old.
• We need forty chairs for the event.

Why Is It “Forty” and Not “Fourty”?

The spelling forty does not follow the simple pattern you might expect from four.

You may think:

four + ty = fourty

But English does not form the number this way. The established spelling is forty.

This is why fourty looks reasonable but is still incorrect in standard English.

The Difference Between Forty and Fourty

Spelling	Correct?	Meaning	Example
forty	✅ Yes	The number 40	I bought forty books.
fourty	❌ No	Common spelling error	❌ I bought fourty books.

There is no difference in meaning between the two forms. The issue is simply spelling.

Where Does “Forty” Come From?

The spelling of forty has a long history.

Its development is connected to older forms of the word for the number 40. Over time, the spelling changed, while the connection to four became less obvious.

Modern English kept the spelling forty.

That is why you should not try to create the word by adding -ty to four.

A Simple Way to Remember It

Think of:

four → forty

not:

four → fourty

The u disappears.

Forty vs. Four: Why the Spelling Changes

This is one of the main reasons learners make this mistake.

Number	Spelling
4	four
14	fourteen
40	forty
44	forty-four

Notice the difference:

• four
• fourteen
• forty

Only forty drops the u.

Examples

• four students
• fourteen students
• forty students
• forty-four students

So, when you reach 40, remember the special spelling.

Is “Fourty” Ever Correct?

No. Fourty is not the standard spelling of the number 40.

If you are writing an essay, email, report, application, exam, or professional document, use forty.

Correct

The company hired forty new employees.

Incorrect

The company hired fourty new employees.

The incorrect form is common because it looks like a logical combination of four and -ty.

How to Use “Forty” in a Sentence

Forty can be used wherever you need to express the number 40.

Age

My uncle is forty years old.

Quantity

There were forty people at the meeting.

Time

The train leaves in forty minutes.

Money

The book costs forty dollars.

Measurement

The building is forty meters tall.

Numbers

She scored forty points in the game.

Forty in Compound Numbers

When 40 appears with another number, write forty first.

Examples:

• forty-one
• forty-two
• forty-three
• forty-four
• forty-five
• forty-six
• forty-seven
• forty-eight
• forty-nine

Never write:

• ❌ fourty-one
• ❌ fourty-two
• ❌ fourty-five

Example

There were forty-eight students in the hall.

Common Mistakes With Forty

1. Adding the “u”

❌ fourty
✅ forty

The most common mistake is keeping the u from four.

2. Writing “fourty” in formal work

❌ The project will take fourty days.
✅ The project will take forty days.

A spelling mistake can make otherwise polished writing look careless.

3. Confusing Forty With Fourteen

These numbers are very different.

• fourteen = 14
• forty = 40

Compare:

She has fourteen books.

She has forty books.

The pronunciation and spelling are different, too.

4. Spelling Forty-Four Incorrectly

❌ fourty-four
✅ forty-four

The first part remains forty.

Forty vs. Fourteen

This is another useful distinction for English learners.

Word	Number	Meaning
four	4	Four units
fourteen	14	Ten plus four
forty	40	Four tens
forty-four	44	Forty plus four

Examples

I have four apples.

They have fourteen apples.

I have forty apples.

I have forty-four apples.

Learning these forms together can make the spelling easier to remember.

How Do You Pronounce “Forty”?

Forty is pronounced differently from four.

• Forty: /ˈfɔːrti/
• Syllables: for-ty

In many accents, the first part sounds like “for”, followed by “ty.”

The spelling does not contain the u found in four.

Listen for the Difference

four → one syllable
forty → two syllables

This pronunciation difference can also help you remember that the words are not spelled identically.

Is Forty the Same in American and British English?

Yes. Forty is the standard spelling in both American English and British English.

Unlike words such as color/colour or favorite/favourite, forty does not have a standard British-versus-American spelling difference.

English Variety	Correct Spelling
American English	forty
British English	forty
Canadian English	forty
Australian English	forty

So you do not need to choose between forty and fourty based on region.

Forty in Real-World Writing

Professional Email

We expect around forty attendees at the meeting.

School Writing

The experiment was repeated forty times.

News Writing

The storm affected more than forty homes.

Social Media

Forty days until the big event!

Formal Report

The survey received responses from forty participants.

In every case, forty is the correct spelling.

A Simple Memory Trick for Forty

Here is an easy trick:

FORTY has FOUR letters before TY?

Actually, don’t try to build it from four. Instead, remember this:

40 = FORTY — no “u.”

You can also connect it with the sequence:

thirty → forty → fifty

All three are short, standard spellings.

Another useful reminder:

Four has a U. Forty does not.

That simple line can help you avoid the mistake.

Forty: Grammar and Number Usage

Forty is a cardinal number. It tells us how many people, things, or units there are.

Before a noun

Forty students joined the class.

As a standalone number

I counted forty.

With a plural noun

Forty cars were parked outside.

When writing the number as a word, forty does not take an -s simply because the quantity is more than one.

❌ fortys
❌ fourtys
✅ forty

However, when discussing the decade, you may see the forties:

She was in her forties.

Here, forties means the age range from 40 to 49.

Forty vs. Forties

These forms have different uses.

Forty = the number 40.

He bought forty tickets.

Forties = numbers or ages from 40 through 49, depending on context.

She is in her forties.

Fashion from the 1940s is still popular.

So don’t confuse forty with forties.

Frequently Asked Questions

Is it forty or fourty?

Forty is correct. Fourty is a common spelling mistake and should not be used in standard English.

Why is forty spelled without a “u”?

The spelling forty developed from older forms of the number word. Modern English uses forty as the established spelling rather than fourty.

Is fourty ever correct?

No. When you mean the number 40, the standard spelling is forty.

Is forty the same in British and American English?

Yes. Both British and American English use forty. There is no standard regional spelling fourty.

How do you spell 40 in words?

The number 40 is spelled forty.

Is it forty-one or fourty-one?

The correct spelling is forty-one. The word forty always appears without the u.

What is the difference between fourteen and forty?

Fourteen means 14, while forty means 40. They differ in both spelling and pronunciation.

Final Takeaway

The answer is simple: forty is correct, while fourty is incorrect.

The mistake happens because four contains a u, making fourty look logical. But English does not follow that pattern here. The correct spelling is always forty, whether you are writing 40, 41, 44, or 49.

Remember this quick rule:

Four has a “u,” but forty does not.

Once you learn this small spelling difference, you will never need to second-guess forty or fourty again.

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