Eighteen vs Eiteen: Correct Spelling Explained In Detail

Have you ever typed “eiteen” and wondered whether it is the correct spelling of 18? You are not alone. Eighteen vs eiteen is a common spelling question because the word does not look exactly the way it sounds.

The correct spelling is eighteen. Eiteen is an incorrect spelling.

In this guide, we will explain why eighteen is correct, what the word means, how to pronounce it, where people commonly make mistakes, and a few simple tricks that can help you remember the spelling permanently.

Eighteen vs Eiteen: Which Spelling Is Correct?

The short answer is simple: eighteen is correct, while eiteen is incorrect.

The correct spelling is “eighteen”

Eighteen is the standard English spelling of the number 18. Major dictionaries, including Merriam-Webster, Cambridge Dictionary, and Oxford Learner’s Dictionaries, list eighteen as the standard form. Merriam-Webster defines it as a number one greater than seventeen, while Cambridge identifies it simply as the number 18.

Examples:

• I have eighteen books.
• She is eighteen years old.
• There are eighteen students in the classroom.
• The package contains eighteen items.

Why “eiteen” is wrong

Eiteen leaves out the gh found in eight, the word from which eighteen historically developed.

Compare them:

Spelling	Correct?	Meaning
eighteen	✅ Yes	The number 18
eiteen	❌ No	Incorrect spelling
eighten	❌ No	Incorrect spelling
eigtheen	❌ No	Incorrect spelling
eightteen	❌ No	Incorrect spelling
eight teen	❌ No	Not the standard spelling

Therefore, if you are writing the number 18 in words, always use eighteen.

What Does Eighteen Mean?

Eighteen is a cardinal number that comes after seventeen and before nineteen. Numerically, it is written as 18.

Eighteen as a number

In simple mathematical terms:

17 + 1 = 18

and

10 + 8 = 18

Merriam-Webster defines eighteen as one more than seventeen, while Collins describes it as the number 18 and also notes its use as a number, numeral, and quantity.

For example:

There are eighteen chairs in the room.

Here, “eighteen” tells us the exact quantity of chairs.

Eighteen as an adjective

The word can also describe something that has a quantity of 18.

For example:

• an eighteen-page report
• an eighteen-year-old student
• an eighteen-month project
• an eighteen-mile journey

When it is part of a compound adjective before a noun, the number is normally written as eighteen, not eiteen.

Eighteen vs eighteenth

Do not confuse eighteen with eighteenth.

Eighteen is a cardinal number:

She has eighteen pencils.

Eighteenth is an ordinal number:

She finished in eighteenth place.

Oxford lists eighteenth as the ordinal form corresponding to 18th.

Why Is Eighteen Spelled With “gh”?

The spelling becomes easier to remember when you look at the word’s history.

The connection between “eight” and “eighteen”

The word eighteen contains the spelling of eight followed by the -teen ending:

eight + teen → eighteen

This is why the spelling contains eigh rather than simply ei.

Oxford gives the word origin as Old English e(a)htatēne, derived from eight and -teen. Merriam-Webster similarly traces the word back through Middle English to Old English.

So you can think of the spelling this way:

EIGHT + TEEN = EIGHTEEN

That visual connection is one of the easiest ways to avoid writing eiteen.

A simple spelling trick

Remember this sentence:

Eight has “gh,” and eighteen keeps the “gh.”

Break the word into two parts:

EIGHT + EEN

or simply remember the visual pattern:

E I G H T E E N

The important part is EIGH, not EITE.

How to Spell Eighteen Correctly

If you frequently forget how to spell 18, use a simple step-by-step method.

Step 1: Start with “eight”

Write:

EIGHT

Step 2: Add “een”

Now add the ending:

EIGHT + EEN

Step 3: Put them together

The result is:

EIGHTEEN

Not:

EITEEN ❌

Step 4: Check the “gh”

Before finishing, look for GH.

If you see:

EIGHTEEN ✅

you have the correct spelling.

If you see:

EITEEN ❌

the spelling is missing GH.

This method is particularly useful for students and English learners because it connects the spelling of 18 directly to the familiar word eight.

Real-Life Example: How a Small Spelling Error Can Matter

Imagine a student named Sarah preparing an application form for a school program. One question asks for her age, and she wants to write her answer in words rather than using the number.

She writes:

“I am eiteen years old.”

The meaning is easy to understand, but the spelling is incorrect. Her teacher notices the mistake and explains that the correct form is:

“I am eighteen years old.”

Sarah initially finds the spelling confusing because when she says eighteen, she hears something close to “ay-teen.” The gh is not pronounced in the same way as the gh in words such as ghost. This makes it easy for learners to omit those letters when spelling the word from memory.

Her teacher gives her a simple trick: start with eight, then connect it with the -teen ending. Sarah writes:

EIGHT + EEN = EIGHTEEN

After practicing the word several times in sentences “I am eighteen,” “There are eighteen students,” and “The book has eighteen chapters” she stops making the mistake.

This example shows why memorizing the pronunciation alone is not always enough. English spelling often preserves historical forms that are not completely predictable from pronunciation. By recognizing the relationship between eight and eighteen, learners can remember the spelling more reliably instead of trying to guess each letter from its sound.

Eighteen Spelling Facts and Current Dictionary Evidence

There is an important distinction between current dictionary evidence and internet search-volume estimates. Search engines may show changing query patterns, but dictionaries provide stronger evidence for determining whether a spelling is standard.

What current dictionaries say

As of 2026:

• Merriam-Webster lists eighteen as the standard word for 18.
• Cambridge Dictionary lists eighteen as an A1 number meaning 18.
• Oxford Learner’s Dictionaries lists eighteen as the number 18 and gives its origin as Old English.
• Collins also lists eighteen and identifies the number as 18. Its American English entry references the Webster’s New World College Dictionary, 5th Digital Edition, copyright 2025.

So the evidence from multiple major dictionary sources is consistent: eighteen is the standard spelling, and eiteen is not.

Quick evidence checklist

Question	Answer
Correct spelling of 18	eighteen
Incorrect spelling	eiteen
Numerical form	18
Cardinal form	eighteen
Ordinal form	eighteenth
Main spelling clue	eight + -teen
Correct pronunciation	Approximately “ay-TEEN”

Common Mistakes With Eighteen

Because the pronunciation does not clearly reveal every letter, several incorrect forms appear frequently.

“Eiteen”

Wrong: I am eiteen years old.
Correct: I am eighteen years old.

The mistake occurs because the writer leaves out gh.

“Eighten”

Wrong: There are eighten people here.
Correct: There are eighteen people here.

This version looks like someone has simply added -en to eight. However, the standard number word is eighteen.

“Eigtheen”

Wrong: She bought eigtheen tickets.
Correct: She bought eighteen tickets.

Here, the letters are rearranged. The t should remain before the een portion.

“Eightteen”

Wrong: The course lasts eightteen weeks.
Correct: The course lasts eighteen weeks.

Adding another t creates an incorrect spelling.

Examples of Eighteen in Sentences

Here are some natural examples to help you recognize the correct spelling.

Everyday examples

• My brother is eighteen years old.
• We invited eighteen guests.
• The class has eighteen students.
• I counted eighteen apples.
• She bought eighteen notebooks.

Formal and academic examples

• The study included eighteen participants.
• The document contains eighteen pages.
• The researcher divided the subjects into eighteen groups.
• The experiment continued for eighteen days.

With age

The word is especially common when talking about age:

He turned eighteen last month.

She has been living there since she was eighteen.

Cambridge also gives examples involving being eighteen years old and uses the word in ordinary contexts involving people and quantities. (Cambridge Dictionary)

FAQs

Q1: Is “eiteen” a correct spelling?

A: No. Eiteen is an incorrect spelling. The correct spelling is eighteen, the word for the number 18.

Q2: How do you spell 18 in English?

A: The correct spelling is eighteen.

18 = eighteen

Q3: Why do people spell eighteen as “eiteen”?

A: People often write eiteen because the pronunciation does not make the letters gh obvious. Since the gh is not pronounced as a separate sound, it is easy to leave those letters out.

Q4: Is it “eighteen” or “eiteen”?

A: It is eighteen. The spelling eiteen is incorrect.

Q5: What is the difference between eighteen and eighteenth?

A: Eighteen is the cardinal number 18.

Eighteenth is the ordinal number 18th.

For example:

• There are eighteen students.
• She came in eighteenth place.

Q6: How can I remember the spelling of eighteen?

A: Connect it with eight:

EIGHT + EEN = EIGHTEEN

Remember that eighteen keeps the “eigh” from “eight.”

Q7: How is eighteen pronounced?

A: It is generally pronounced approximately “ay-TEEN.” Cambridge and Oxford give the pronunciation as /ˌeɪˈtiːn/, with normal British and American pronunciation notation.

Q8: Is “eight teen” correct?

A: No. When referring to the number 18, the standard spelling is one word: eighteen.

Conclusion:

When comparing eighteen vs eiteen, there is only one correct standard spelling: eighteen.

Eiteen ❌ is a spelling mistake, while eighteen ✅ is the correct English word for the number 18. The easiest way to remember it is to connect it with eight:

EIGHT + EEN = EIGHTEEN

Once you remember the GH, the spelling becomes much easier.

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