Forty is the correct spelling of the number 40, while fourty is a common spelling mistake. Although the number is related to the word “four,” its standard English spelling does not include the letter “u.”
This small spelling difference causes confusion because many people naturally expect the word to follow the pattern of four, fourteen, and fourteen related forms. However, English spelling does not always follow a perfectly regular pattern.
The correct form is important in schoolwork, business writing, emails, official documents, and everyday communication. Writing fourty may make an otherwise correct sentence look misspelled.
In this guide, we will explain why forty is correct, where the spelling comes from, how to pronounce it, how to use it in sentences, and why people often add the missing “u.” We will also look at related numbers such as forty one and forty first.
Fourty and Forty : Quick Answer
Forty is the correct spelling.
Fourty is incorrect in standard English.
For example:
She is forty years old.
The box contains forty books.
Not:
She is fourty years old.
The easiest rule to remember is:
40 = forty
There is no u after the o.
Definition and Meaning
What Does Forty Mean?
Forty is the word used for the number 40.
It comes after 39 and before 41.
Examples include:
- Forty students
- Forty dollars
- Forty minutes
- Forty people
- Forty years
The word can be used as a number, an amount, or part of a larger number.
What Does Fourty Mean?
Fourty is not the standard spelling of the number 40.
It is usually a spelling mistake caused by connecting the word too closely with four.
The correct form is always:
forty
Why Is Forty Spelled Without a U?
This is one of the most common questions about the word.
The spelling developed differently from what modern English speakers might expect.
The word has historical roots connected to older forms of English, and its spelling changed over time. The modern form eventually became forty, rather than following the spelling pattern of four.
So, although:
four → 4
the number 40 is:
forty
not:
fourty
English has many spelling patterns that developed through historical changes rather than through a single simple rule.
The Origin of Forty
The history of this number word helps explain the unusual spelling.
Forty comes from older English forms related to the number four. Over time, its spelling changed, and the modern form became established as forty.
The word is related historically to four, but the spelling was not preserved in exactly the same form.
This is why modern English has:
- Four
- Fourteen
- Forty
The difference may look strange, but it is a standard part of English spelling.
Forty or Four: Why Are They Different?
The confusion usually comes from the connection between the two words.
Four is the basic number.
Forty means four groups of ten.
However, English does not form the second word simply by adding “ty” to the complete spelling of four.
Compare:
| Number | Correct Word |
| 4 | Four |
| 14 | Fourteen |
| 40 | Forty |
| 44 | Forty four |
| 400 | Four hundred |
This pattern makes it easier to remember the spelling.
How to Spell Forty Correctly
Remember this:
F O R T Y
There is no U.
A useful memory trick is:
Forty has four letters before the ending? Actually, the easiest trick is simply to remember that four loses its “u” in forty.
Think:
FOUR → FORTY
The u disappears.
Forty One and Other Numbers
When 40 is combined with another number, the same spelling remains.
Examples:
- Forty one
- Forty two
- Forty three
- Forty four
- Forty five
- Forty six
- Forty seven
- Forty eight
- Forty nine
Notice that every number from 41 to 49 begins with forty, not fourty.
For example:
There are forty five students.
Not:
There are fourty five students.
Fourty or Forty in Formal Writing
Use forty in all forms of standard English writing.
This includes:
- School assignments
- Exams
- Emails
- Business documents
- Websites
- Reports
- Applications
- Official forms
Fourty should be corrected when it is being used to spell the number 40.
For example:
The company has forty employees.
This is correct and suitable for formal writing.
Common Mistakes With the Spelling
Mistake 1: Adding the U From Four
Some people write:
Fourty
because they remember the spelling of four.
The correct form is:
Forty
Mistake 2: Writing Fourty One
The same error can appear in larger numbers.
Incorrect:
Fourty one
Correct:
Forty one
Mistake 3: Confusing Forty With Fourteen
These numbers are different.
- Fourteen = 14
- Forty = 40
The difference is important in both writing and speech.
Forty vs Fourteen
These two words are sometimes confused because their letters look similar.
| Number | Spelling | Meaning |
| 14 | Fourteen | Ten + four |
| 40 | Forty | Four groups of ten |
Examples:
I have fourteen dollars.
I have forty dollars.
The pronunciation is also different, so listening carefully can help prevent confusion.
How Is Forty Pronounced?
Forty is generally pronounced approximately like:
FOR tee
The first part sounds like “for,” followed by a sound similar to “tee.”
The pronunciation does not include an extra syllable for the missing u.
The word fourty, besides being misspelled, can also lead learners to imagine the wrong spelling pattern.
Forty or 40 in Writing
Both forty and 40 can represent the same number.
The choice often depends on the type of writing.
For example:
Forty students attended the meeting.
or:
40 students attended the meeting.
In formal writing, style guides may have rules about when numbers should be written as words or numerals. The important point here is that when the number is written in words, the correct form is forty.
Forty in Everyday Examples
Age
My uncle is forty years old.
Money
The ticket costs forty dollars.
Time
The journey takes forty minutes.
Quantity
We ordered forty chairs.
Distance
The town is forty miles away.
School
Forty students joined the class.
These examples show how naturally the word appears in everyday English.
British English vs American English
Forty is the standard spelling in both British and American English.
There is no British spelling fourty and American spelling forty distinction.
Both varieties use:
Forty
For example:
| Variety | Correct Spelling |
| British English | Forty |
| American English | Forty |
| Canadian English | Forty |
| Australian English | Forty |
The spelling remains the same across these major varieties.
Which Spelling Should You Use?
Always use forty when writing the number 40 in standard English.
Use:
forty
Avoid:
fourty
This applies to formal and informal writing alike.
If you are writing a number from 41 to 49, continue using the same spelling:
forty one
forty two
forty three
forty four
Forty First vs Fourtieth
The ordinal form of 40 is:
fortieth
Not:
fourtieth
For example:
She finished in fortieth place.
The spelling changes slightly when the number becomes ordinal, but the u is still not used.
Compare:
| Cardinal | Ordinal |
| Forty | Fortieth |
| 40 | 40th |
This is another useful spelling pattern to remember.
Is Fourty Ever Correct?
For the number 40, fourty is not the standard English spelling.
You may occasionally see it as a spelling error or in historical, specialized, or nonstandard material, but it should not be used in normal modern English when writing the number.
The standard form is:
forty
Google Trends & Usage Data
People commonly search for this spelling question because the relationship between four and forty makes the error easy to understand.
Common searches include:
- Fourty or forty
- Is fourty correct?
- How do you spell forty?
- How to spell 40
- Forty spelling
- Forty or fourty which is correct?
Search interest can vary over time and by country. English learners and students may search for the spelling more often when learning number words.
People Also Ask About Forty
Is fourty or forty correct?
Forty is correct. Fourty is a common misspelling.
Why is forty not spelled fourty?
The modern spelling developed through historical changes and became established as forty, even though it is related to the word four.
How do you spell 40 in English?
The number 40 is spelled forty.
Is forty spelled with a U?
No. Forty does not contain the letter U.
How do you spell 41?
41 is spelled forty one.
What is the ordinal form of forty?
The ordinal form is fortieth.
Is fourty a word?
It may appear as a nonstandard or historical spelling, but it is not the standard spelling of the number 40 in modern English.
Why do people spell forty incorrectly?
The main reason is the natural connection with four, which can make people expect the spelling to include u.
Is forty the same in British and American English?
Yes. Both use forty.
How do you remember the spelling of forty?
Remember that the u in four disappears when you write forty.
Frequently Asked Questions
What is the correct spelling of 40?
The correct spelling is forty.
Is fourty wrong?
Yes, when it is intended as the standard spelling of the number 40, fourty is incorrect.
Is forty four correct?
Yes. The correct spelling is forty four.
How do you spell 40th?
The correct spelling is fortieth, while 40th is the numeral form.
Is forty a cardinal number?
Yes. Forty is a cardinal number because it tells us how many.
Is fortieth an ordinal number?
Yes. Fortieth is an ordinal number because it describes position or order.
Does British English use fourty?
No. British English also uses forty.
Final Comparison
| Point | Forty | Fourty |
| Meaning | Number 40 | Intended as number 40 |
| Standard spelling | Yes | No |
| Contains U | No | Yes |
| Formal writing | Correct | Incorrect |
| British English | Correct | Incorrect |
| American English | Correct | Incorrect |
| Ordinal form | Fortieth | Fourtieth is incorrect |
Conclusion
Forty is the correct spelling of the number 40, while fourty is a common spelling mistake. The confusion is understandable because the number is closely related to the word four, but English spelling does not always follow a completely predictable pattern.
The easiest rule is simple: when writing 40 in words, use forty and leave out the u. The same spelling appears in numbers such as forty one, forty five, and forty nine.
The ordinal form is fortieth, not “fourtieth.” The standard spelling is also the same in British and American English.
Once you remember that the u disappears from four when forming forty, this common spelling problem becomes much easier to avoid.
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Ethan Parker is an English-language writer known for his interest in words, language, and clear communication. His work focuses on making everyday English easier to understand through simple explanations and practical examples.
