Nineth or Ninth: Which Spelling Is Correct?

Have you ever wondered whether nineth or ninth is the correct spelling? The confusion is understandable because the number nine seems like it should become “nineth” when you add “th.”

The correct spelling is ninth. In this guide, you will learn why ninth is correct, why nineth is a common mistake and how to use ninth correctly in dates, rankings, grades and everyday writing.

Nineth or Ninth

Ninth is the correct spelling. Nineth is incorrect when you mean the ordinal number for nine. Dictionary.com defines ninth as the ordinal number for nine and also uses it for one of nine equal parts.

Form	Correct?	Meaning	Example
ninth	✅ Yes	Ordinal form of nine	She finished ninth.
nineth	❌ No	Common misspelling	Avoid “nineth place.”
9th	✅ Yes	Numerical form	She finished 9th.
nine	✅ Yes	Cardinal number	There are nine students.

So, if you are writing 9th as a word, write ninth, not nineth.

What Does Ninth Mean?

Ninth is an ordinal number. It describes the position of something in a sequence or order.

For example:

• She came ninth in the race.
• Today is the ninth day of the month.
• He lives on the ninth floor.
• This is my ninth birthday celebration.
• We are reading the ninth chapter.

The difference between nine and ninth is important. Nine tells us how many there are. Ninth tells us where something comes in an order.

For example:

There are nine students in the room.

This sentence gives a quantity.

Sarah is the ninth student in line.

This sentence gives a position.

Why Is It Ninth and Not Nineth?

The easiest way to remember the spelling is:

NINE → NIN + TH → NINTH

The final e in nine does not remain when the ordinal form is written as ninth.

That is why these forms are different:

• nine → ninth
• five → fifth
• twelve → twelfth

English ordinal numbers do not always form their spelling by simply adding th to the complete cardinal number. Some words change their spelling when they become ordinal numbers.

The form nineth looks logical at first. However, standard English uses ninth.

Is Nineth a Word?

When nineth is used as an attempt to spell the ordinal number for nine, it is considered a misspelling. Wiktionary lists nineth as a misspelling of ninth.

You may see nineth online because people sometimes spell words according to how they expect them to be formed. Seeing the spelling does not make it the standard form.

For school assignments, professional writing, articles, emails and other formal situations, use ninth.

For example:

Incorrect:
She finished in the nineth position.

Correct:
She finished in the ninth position.

The intended meaning is clear in both sentences, but only ninth is the standard spelling.

Common Uses of Ninth

The word ninth appears in many everyday situations. Knowing these examples can make the spelling easier to remember.

Ninth in Rankings

Use ninth when describing a position in a competition or ranking.

Our team finished ninth in the tournament.

He ranked ninth in his class.

She came ninth in the race.

Ninth in School

The word is also common when discussing grades or school levels.

My brother is in ninth grade.

The ninth-grade students attended the event.

She started ninth grade this year.

Ninth in Dates

You can use ninth when writing a date with words.

The meeting is on the ninth of October.

Her birthday is on the ninth of May.

We arrived on the ninth day of the trip.

When using numerals, you can write 9 or 9th, depending on the style and context.

For example:

October 9

October 9th

When spelling the ordinal number out, however, use ninth.

Ninth in Addresses and Names

You may also see Ninth in street names and other proper names.

For example:

The store is located on Ninth Street.

Here, Ninth is part of the proper name, so it is capitalized.

Ninth in Fractions

Ninth can also refer to one of nine equal parts.

For example:

One ninth of the cake was left.

This can be written numerically as 1/9.

Dictionary.com also lists ninth as a noun referring to a ninth part.

Nine vs Ninth: What Is the Difference?

The words nine and ninth are related but do different jobs.

Nine is a cardinal number. It tells us the quantity.

I have nine books.

Ninth is an ordinal number. It tells us the position.

The ninth book is my favorite.

Here is another simple comparison:

Word	Type	What it tells us	Example
nine	Cardinal number	Quantity	I have nine apples.
ninth	Ordinal number	Position	I ate the ninth apple.
9	Cardinal numeral	Quantity	There are 9 apples.
9th	Ordinal numeral	Position	She finished 9th.

Remembering this difference can help you choose the right word in a sentence.

Common Mistakes With Ninth

The most common mistake is writing nineth because the spelling seems to follow the pattern of other ordinal numbers.

Here are some examples.

Incorrect: Nineth Grade

He is in the nineth grade.

Correct: Ninth Grade

He is in the ninth grade.

Incorrect: Nineth Place

She finished in nineth place.

Correct: Ninth Place

She finished in ninth place.

Incorrect: Nineth Chapter

Read the nineth chapter.

Correct: Ninth Chapter

Read the ninth chapter.

Incorrect: Nineth Birthday

Today is her nineth birthday.

Correct: Ninth Birthday

Today is her ninth birthday.

The rule stays the same in each example. Use ninth.

How Do You Spell 9th in Words?

The word form of 9th is:

N I N T H

So:

9th = ninth

Not:

9th = nineth

This is useful when completing schoolwork, writing formal documents or spelling out dates.

A quick memory trick is:

NINE minus E + TH = NINTH

Think of the word as losing its final e before the th ending.

Is Ninth the Same in British and American English?

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

There is no British spelling such as nineth that replaces ninth. Dictionary.com lists the word as ninth in both American and British entries.

Therefore, you can safely use ninth whether you are writing for readers in the United States, United Kingdom or other English speaking regions.

For example:

American English: She is in ninth grade.

British English: She is in the ninth year.

The surrounding wording may differ because education systems use different terms, but the spelling ninth remains correct.

Ninth in Everyday Sentences

Seeing the word in natural sentences can make the correct spelling easier to remember.

Here are several examples:

• This is my ninth attempt.
• She lives on the ninth floor.
• We reached the ninth chapter.
• He finished ninth in the competition.
• Today is the ninth of June.
• Their team won its ninth game.
• The ninth question was difficult.
• She celebrated her ninth birthday.
• The event starts on the ninth.
• He was the ninth person to arrive.

In every example, ninth refers to position, order or a division into nine parts.

What About Nineteenth?

Another spelling that sometimes causes confusion is nineteenth.

The words ninth and nineteenth are not interchangeable.

Ninth means number 9 in order.

She finished ninth.

Nineteenth means number 19 in order.

She finished nineteenth.

Notice the different spellings:

9th → ninth

19th → nineteenth

This distinction matters when writing dates, rankings and numbers.

For example:

The event is on the ninth of March.

means the 9th day of March.

The event is on the nineteenth of March.

means the 19th day of March.

Is “Nint” Correct?

If you came across nint while checking this spelling, context matters. Nint is not the standard modern English spelling for the ordinal number nine.

There is a separate historical and regional use of nint in Scots, where it means “ninth.” Wiktionary records this as a Scots form rather than standard modern English.

For ordinary English writing, do not replace ninth with nint.

If your goal is to write the English ordinal number for 9, use:

ninth

Why Is Nineth Such an Easy Mistake?

The mistake makes sense from a spelling perspective.

When people see:

nine

they may naturally think:

nine + th = nineth

Several common ordinal numbers do appear to follow a similar pattern. For example:

four → fourth

six → sixth

seven → seventh

That can make nineth feel reasonable.

However, English has many spelling patterns that are not completely predictable. Ninth is one of those forms that needs to be remembered as the standard spelling.

The good news is that the rule is simple:

nine → ninth

Once you remember that the final e disappears, the spelling becomes much easier.

Ninth or Nineth: Which One Should You Use?

Use ninth whenever you mean the ordinal number associated with nine.

Choose ninth in:

• School assignments
• Essays
• Emails
• Reports
• Dates
• Rankings
• Addresses
• Articles
• Professional documents
• Everyday messages

Avoid nineth when you are writing standard English.

If you are using numerals, 9th is also correct when an ordinal form is appropriate.

So the three useful forms are:

nine for quantity

ninth for position

9th for the numerical ordinal form

Frequently Asked Questions About Nineth or Ninth

Is it nineth or ninth?

Ninth is correct. Nineth is a misspelling of the ordinal number for nine.

How do you spell 9th in words?

The correct spelling is ninth.

Why is ninth not spelled nineth?

The final e in nine is removed when the ordinal form is written as ninth.

Is nineth ever correct in standard English?

No. When you mean the ordinal number for nine, the standard spelling is ninth.

What is the difference between nine and ninth?

Nine describes a quantity, while ninth describes position or order.

Conclusion

If you are choosing between nineth or ninth, always choose ninth when you mean the ordinal number for nine. The spelling nineth is a common mistake caused by keeping the final e from nine.

The easiest rule is simple:

NINE → NINTH

Use nine for quantity, ninth for position and 9th when using the numerical form. Whether you are writing about ninth grade, ninth place, the ninth day or the ninth chapter, ninth is the correct choice.