When writing the number 18 in English, many people hesitate between eighteen and eiteen. The two forms look similar, and the pronunciation can make the spelling less obvious. However, there is a simple answer: eighteen is the correct spelling, while eiteen is a misspelling.
The word eighteen is the standard English word for the number 18. It is used in American English, British English, and other major varieties of English. The spelling does not change between US and UK English.
Eiteen is not an accepted alternative spelling of the number. It is usually the result of leaving out the gh from eighteen.
This mistake is understandable because the letters gh are not pronounced as a separate sound in modern pronunciation. When people hear the word, they may naturally spell it according to the sounds they recognize. That can lead to forms such as “eiteen.”
The important point is that English spelling is not always a direct representation of pronunciation. Some words contain letters that are silent or have changed in pronunciation over time. Eighteen is one example.
If you are writing an email, school assignment, business document, application, website, or any other formal English text, use eighteen.
Quick Answer
Eighteen is the correct spelling.
Eiteen is incorrect and should not be used in standard English.
| Context | Best Choice | Why |
|---|---|---|
| Standard English | eighteen | This is the established spelling of 18. |
| American English | eighteen | US English uses this spelling. |
| British English | eighteen | British English also uses this spelling. |
| Formal writing | eighteen | It is the standard written form. |
| School writing | eighteen | “Eiteen” is a spelling error. |
| Informal writing | eighteen | The standard form remains preferred. |
| “Eiteen” | Incorrect | It omits the letters gh. |
A useful sentence is:
She turned eighteen last month.
Not:
She turned eiteen last month.
Why People Confuse Them
The main reason people confuse eighteen and eiteen is pronunciation.
In modern English, eighteen is generally pronounced approximately like “ay-TEEN.” The letters gh do not represent a separate sound in this word.
That can create a spelling problem for learners. If someone hears “eighteen” without seeing it written, they may try to spell it as eiteen.
English contains many words where spelling and pronunciation do not match perfectly. A word can contain letters that are silent, weakened, or pronounced differently from what a learner expects.
The number words from 13 through 19 can also create confusion because many of them end in -teen:
- thirteen
- fourteen
- fifteen
- sixteen
- seventeen
- eighteen
- nineteen
The spelling of eighteen is unusual compared with several nearby number words because its first part comes from eight.
The word eight contains gh, and eighteen keeps that spelling:
eight + teen = eighteen
This is one of the easiest ways to remember the correct form.
A common mistake is to think:
eight → eite
and then write:
eiteen
But the correct spelling keeps the letters from eight:
eight → eighteen
Key Differences At A Glance
There is no real spelling-choice difference between eighteen and eiteen in standard English.
One is correct, and the other is a misspelling.
| Feature | Eighteen | Eiteen |
|---|---|---|
| Standard spelling | Yes | No |
| Represents number 18 | Yes | Intended to, but incorrectly |
| US English | Correct | Incorrect |
| UK English | Correct | Incorrect |
| Formal writing | Correct | Incorrect |
| Pronunciation | “ay-TEEN” | Usually intended to represent the same word |
| Dictionary form | Yes | No standard form |
| Recommended use | Yes | No |
The most important difference is therefore correctness, not meaning.
If someone writes eiteen, readers will usually understand that they meant eighteen. However, understanding the intended word does not make the spelling correct.
Are They the Same Word?
The intended word is the same, but the spellings are not equally acceptable.
Eighteen is the standard written form for the number 18.
Eiteen is a misspelling of eighteen. It does not represent a separate standard English word with a different meaning.
For example:
- My brother is eighteen. — Correct.
- My brother is eiteen. — Incorrect spelling.
Both sentences clearly attempt to communicate the same idea, but only the first uses standard English spelling.
This distinction matters because a spelling error does not automatically create a new word. When someone types “eiteen,” the reader can usually identify the intended word from context.
The same thing happens with many everyday spelling mistakes. A reader may understand a word even when one or more letters are missing, but that does not make the misspelled form acceptable in careful writing.
There is also no US-versus-UK difference here. American and British English both use eighteen.
Pronunciation
Eighteen is commonly pronounced approximately “ay-TEEN.”
The first part sounds like the word eight, followed by -teen.
The spelling can therefore be surprising because the gh does not create a separate sound in modern pronunciation.
For learners, the safest approach is to remember the written relationship:
eight + teen = eighteen
Rather than trying to spell the word entirely from its pronunciation, remember that the spelling preserves the eight part.
US vs UK Preference
There is no meaningful US-versus-UK spelling difference between eighteen and eiteen.
American English uses:
eighteen
British English also uses:
eighteen
Canadian, Australian, and other major varieties of standard English likewise use eighteen.
Therefore, this is not a case like some words where American and British spelling traditions differ. There is no standard American form eiteen and British form eighteen.
If you are writing for a US audience, choose eighteen.
If you are writing for a British audience, choose eighteen.
The same advice applies to academic writing, professional writing, general communication, and everyday messages.
The form eiteen should not be presented as a regional spelling.
Which Spelling Should You Use?
Use eighteen whenever you mean the number 18.
Examples include:
- I am eighteen years old.
- The package weighs eighteen pounds.
- She bought eighteen books.
- The class starts at eighteen minutes past the hour.
- He scored eighteen points.
- There are eighteen students in the group.
In formal writing, the choice is especially simple: use eighteen.
If you are writing a résumé, application, school paper, report, letter, article, or business message, avoid eiteen.
Even in casual communication, there is little reason to use the misspelled form. The correct spelling is short and easy to learn once you connect it with eight.
A useful memory pattern is:
eight → eighteen
The word eighteen keeps the letters e-i-g-h-t from eight and adds -een.
Notice that the spelling is not:
eiteen
It is:
eighteen
When One Spelling Looks Wrong
For a standard English reader, eiteen looks wrong because the expected spelling of the number is eighteen.
The missing gh is the main visual clue.
Compare:
eight
and
eighteen
The spelling connection becomes much easier to see when the words are placed side by side.
The mistake often happens because gh is not pronounced separately. A learner may hear something close to “ayteen” and write what seems logical from the sound.
However, pronunciation cannot always provide every letter in English spelling.
Consider the structure:
eight + teen
The ending -teen is added to the number base. The spelling therefore preserves the recognizable form of eight.
This is why learning the word as a complete spelling pattern is more reliable than trying to reconstruct it from sound.
A Simple Memory Trick
Remember this:
18 = eight + teen = eighteen
Think of eight first.
Then attach teen:
eight + teen
The result is:
eighteen
This simple connection can prevent the common mistake of dropping gh.
Common Mistakes (and Quick Fixes)
Mistake 1: Writing “eiteen”
Incorrect:
I am eiteen years old.
Correct:
I am eighteen years old.
Fix: Remember that eighteen contains the spelling of eight.
Mistake 2: Removing “gh”
Incorrect:
There are eiteen chairs.
Correct:
There are eighteen chairs.
Fix: Do not remove gh just because those letters are not pronounced separately.
Mistake 3: Assuming pronunciation determines every letter
A learner may hear something similar to “ayteen” and assume the spelling should match the sound.
That approach does not work reliably in English.
Fix: Learn the written form eighteen as a complete word.
Mistake 4: Treating “eiteen” as a regional spelling
Some writers may assume that eiteen could be an American or British alternative.
It is not.
Fix: Use eighteen in both US and UK English.
Mistake 5: Forgetting the connection to “eight”
The word becomes easier to remember when you connect it to its base number.
eight → eighteen
Fix: When uncertain, write eight first and add the -een ending.
Mistake 6: Confusing “eighteen” with another number
Because many number words end in -teen, learners sometimes focus too much on the ending.
Remember:
18 = eighteen
It is the number that comes after seventeen and before nineteen.
Everyday Examples
Here are natural examples showing how eighteen is used in American English.
Age
My daughter is eighteen years old.
He turned eighteen in June.
She will be eighteen next week.
The minimum age for the program is eighteen.
Quantity
We ordered eighteen pizzas for the event.
There are eighteen students in the classroom.
The box contains eighteen individual packages.
Money
The book costs eighteen dollars.
I paid eighteen dollars for the ticket.
The meal was eighteen dollars before tax.
Sports
The player scored eighteen points.
The team finished with eighteen wins.
He wore number eighteen during the season.
School
The student received eighteen out of twenty points.
The class has eighteen students.
The assignment is eighteen pages long.
Time and measurement
The train arrives in eighteen minutes.
The package weighs eighteen pounds.
The road is eighteen miles long.
Dates and addresses
The word eighteen can also appear when a number is written out in prose.
The document refers to eighteen separate cases.
The building was completed eighteen years ago.
She lives at 18 Oak Street.
When a number is part of an address, a style guide may determine whether the number is written as a numeral or spelled out. That is a separate writing-style issue. It does not change the spelling of the word eighteen itself.
Dictionary-Style Word Details
Verb
Eighteen: Not normally used as a standard verb in modern US English.
Eiteen: Not a standard verb.
The word eighteen primarily functions as a number word. It does not become a standard verb simply because the misspelled form sometimes appears in informal writing.
There is therefore no meaningful verb comparison between the two spellings.
Noun
Eighteen: Can function as a noun when referring to the number itself.
For example:
Eighteen is an even number.
Here, eighteen names the number.
It can also appear in expressions where the number functions substantively:
She chose eighteen.
Eiteen: Not a standard noun spelling.
If a writer intends to name the number 18, the correct noun form is eighteen.
Synonyms
Eighteen: As a number, it does not have ordinary synonyms in the same way that many descriptive words do.
The closest plain alternatives are expressions such as:
- the number 18
- eighteen
- one more than seventeen
- one less than nineteen
These are ways of referring to the same numerical value, rather than exact synonyms.
Eiteen: Because it is a misspelling, it does not have a separate synonym set.
If you see eiteen, correct it to eighteen.
There is also no useful antonym for eighteen as a number. Numbers can be contrasted mathematically, but that does not make the contrasting number a true linguistic antonym.
Example Sentences
Eighteen:
My cousin is eighteen years old.
We need eighteen chairs for the meeting.
The store opens at eighteen minutes past the hour.
She read eighteen pages before going to bed.
The package contains eighteen items.
Eiteen:
“Eiteen” is a common spelling mistake for “eighteen.”
Please change “eiteen” to “eighteen” before submitting the document.
The second spelling should not be used as the normal written form of the number.
Word History
The spelling of eighteen is connected to the word eight and the number-forming ending -teen.
The important point for modern writers is that the spelling retains the gh found in eight:
eight → eighteen
The letters gh do not represent a separate sound in the modern pronunciation of eighteen. This difference between spelling and pronunciation helps explain why learners may be tempted to write eiteen.
There is no need to create a complicated historical explanation to remember the modern spelling. For everyday writing, the most useful fact is that eighteen preserves the written form of eight.
Phrases Containing
Eighteen appears in many ordinary phrases and expressions involving the number 18.
Examples include:
- eighteen years old
- eighteen people
- eighteen students
- eighteen dollars
- eighteen minutes
- eighteen months
- eighteen miles
- eighteen points
- eighteen pages
- eighteen questions
- eighteen days
- eighteen weeks
The spelling remains eighteen in each case.
For example:
The course lasts eighteen weeks.
There are eighteen questions on the test.
He has been working there for eighteen months.
Eiteen should not replace eighteen in these expressions.
FAQs
Is “eighteen” or “eiteen” correct?
Eighteen is correct. Eiteen is a misspelling and is not the standard spelling of the number 18.
How do you spell the number 18?
The number 18 is spelled eighteen.
Correct: eighteen
Incorrect: eiteen
Why is “eiteen” incorrect?
“Eiteen” is incorrect because the standard spelling keeps the gh found in eight. The correct form is eighteen, not eiteen.
Is “eiteen” a British spelling?
No. Eiteen is not a standard British spelling. British English uses eighteen, just like American English.
Is “eighteen” the correct American spelling?
Yes. Eighteen is the standard spelling in American English for the number 18.
Why is “eighteen” spelled with “gh”?
The spelling of eighteen is connected to eight, so it retains the letters gh. Although those letters are not pronounced separately, they remain part of the standard spelling.
How do you pronounce “eighteen”?
Eighteen is commonly pronounced approximately “ay-TEEN.” The gh does not have a separate sound in the modern pronunciation.
Can I write “eiteen” in informal English?
It is better to avoid eiteen, even in informal English. It is a misspelling, while eighteen is the standard form.
Is “eighteen” one word or two words?
Eighteen is written as one word.
Correct: She is eighteen years old.
What is the easiest way to remember the spelling of eighteen?
Connect it with the word eight:
eight + teen = eighteen
Remembering the gh in eight can help you avoid writing eiteen.
Conclusion
The answer is straightforward: eighteen is correct, and eiteen is incorrect.
The two forms do not represent competing US and UK spellings. Eiteen is simply a misspelling of eighteen.
The confusion mainly comes from pronunciation. The letters gh are not pronounced as a separate sound in modern eighteen, so someone who spells by sound may accidentally leave them out.
The easiest way to remember the correct spelling is to connect the word with eight:
eight + teen = eighteen
When writing the number 18, keep the gh:
EIGHTEEN
Do not write:
EITEEN
This rule works for American English and British English alike. Whether you are writing a school assignment, professional document, email, article, application, or everyday message, eighteen is the standard spelling.
If you remember only one thing, remember this:
18 = eighteen.
The spelling eiteen should be corrected whenever it appears in standard English writing.
