Nineth or Ninth: Which Spelling Is Correct?

The correct spelling is ninth. The spelling nineth is wrong.
Many people search for “nineth or ninth” because they hear the word when speaking but feel unsure when writing it. The two spellings look similar.

They also sound almost the same. This causes confusion in school work, exams, emails, dates, addresses, and online forms.

This problem is very common with numbers in English. Words like fifth, eighth, and ninth change their spelling when written as ordinal numbers.

Learners often think nineth should follow the same pattern as nine + th. But English spelling rules do not always work this way.

People also see wrong spellings online. Some websites, social posts, and comments use nineth by mistake. This makes learners think both spellings might be correct. Spellcheck does not always catch this error, especially on phones.

This article clears the confusion in simple words. You will get a quick answer first. Then you will learn the origin of the word, spelling rules, British vs American usage, common mistakes, real-life examples, trends, and FAQs. By the end, you will always know to use ninth, not nineth.

---

Nineth or Ninth – Quick Answer

Ninth is correct.
Nineth is incorrect.

Examples:

• Today is my ninth birthday. ✅
• She lives on the ninth floor. ✅
• He finished in ninth place. ✅

Wrong examples:

• Today is my nineth birthday. ❌
• She lives on the nineth floor. ❌

Simple rule:
Drop the e in nine and add th → ninth

---

The Origin of Nineth or Ninth

The word ninth comes from Old English nigotha. Over time, English simplified the spelling. The base number is nine. But when we change it to the ordinal form, English drops the final e and adds th.

This is not unique to ninth. English does this with several numbers:

• five → fifth
• eight → eighth
• nine → ninth

The spelling nineth never existed in standard English. It is a modern spelling mistake. People write it because they think ordinal numbers always follow a simple rule: add th to the number. But English has exceptions.

So, nineth is not a historical spelling. It is just a common error.

---

British English vs American English Spelling

There is no difference between British and American English here.

Both use:

• ninth ✅

Both reject:

• nineth ❌

Comparison Table

Form	British English	American English	Correct
ninth	ninth	ninth	✅ Yes
nineth	nineth	nineth	❌ No

---

Which Spelling Should You Use?

This choice is simple:

• US audience → ninth
• UK audience → ninth
• Commonwealth countries → ninth
• Global audience → ninth

There is no situation where nineth is correct in standard English.
If you want to write clearly and professionally, always use ninth.

---

Common Mistakes with Nineth or Ninth

❌ He came in nineth place.

✅ He came in ninth place.

❌ This is the nineth time I called you.

✅ This is the ninth time I called you.

❌ My house is on the nineth street.
✅ My house is on the ninth street.

Tip to remember:
Think of fifth and eighth. They drop letters.
Nine → ninth also drops the e.

---

Nineth or Ninth in Everyday Examples

Emails:

• Our office is on the ninth floor.

News:

• The team finished in ninth position this season.

Social Media:

• Today is my ninth anniversary!

Formal Writing:

• The ninth chapter explains the method.

School & Exams:

• She is in the ninth grade.

---

Nineth or Ninth – Google Trends & Usage Data

Search data shows that ninth is used far more than nineth.
Most searches for nineth come from people checking spelling or correcting mistakes.

Common regions where people search this keyword:

• South Asia
• Southeast Asia
• Middle East
• Students learning English

In books, articles, and official writing, ninth is the only accepted form.
Nineth appears mostly in typos, comments, and informal posts.

---

Comparison Table: Nineth vs Ninth

Feature	Ninth	Nineth
Correct spelling	Yes	No
Used in exams	Yes	No
Used in formal writing	Yes	No
Dictionary form	Yes	No
Professional usage	Yes	No

---

FAQs About Nineth or Ninth

1. Is nineth a real English word?
No. It is a spelling mistake.

2. Which spelling is correct in British English?
Ninth.

3. Which spelling is correct in American English?
Ninth.

4. Why do people write nineth?
Because they add “th” to nine and forget to drop the “e.”

5. Is “ninth grade” correct?
Yes. “Ninth grade” is correct.

6. Can nineth ever be correct?
No. It is never correct in standard English.

7. How can I remember the spelling?
Remember: five → fifth, eight → eighth, nine → ninth.

---

Conclusion

The confusion between nineth or ninth is very common, especially for English learners and students. The reason is simple. People hear the word “ninth” when speaking. Then they try to write it by adding th to nine. This leads to the wrong spelling nineth. But English spelling rules are not always direct. Some words change when they become ordinal numbers.

The correct spelling is ninth. This is true in British English, American English, and all standard forms of English. The spelling nineth is always wrong. It does not appear in dictionaries as a correct form. It should never be used in exams, emails, school work, or professional writing.

If you remember just one rule, remember this:
Drop the “e” in nine and add “th” → ninth.
With this simple rule, you will never make this mistake again. Your writing will look clear, correct, and professional every time.

Learn more related post:

Optimize or Optimise: Which Spelling Should You Use?(2026)