Have you ever typed “fourth or forth” and stopped to wonder which word is right? You are not alone. These two words sound almost the same, but they have very different meanings. One is linked to the number four, while the other usually means moving forward or onward.
The confusion happens because fourth and forth are homophones. They sound alike in many varieties of English, but their spellings and meanings are different. This can make everyday writing, emails, schoolwork, and professional documents tricky.
The good news is that the answer is simple. Fourth is used for number four in a sequence. Forth usually means forward, onward, or out. These spellings do not change between British and American English.
In this guide, you will learn the difference between fourth or forth, where both words came from, common mistakes, and how to choose the right word every time.
Quick rule: FOUR = FOURTH; FORWARD = FORTH.
Fourth or Forth – Quick Answer
Fourth is correct when you mean the number four or the fourth position in a sequence.
- She finished in fourth place.
- Today is the fourth of May.
- This is my fourth attempt.
- He lives on the fourth floor.
Forth means forward, onward, or out.
- We went forth into the unknown.
- She stepped forth to speak.
- The soldiers marched forth.
- From this day forth, things will change.
The easiest memory trick is:
Four → fourth
Forward → forth
The two words are homophones, so they can sound the same even though they have different meanings.
The Origin of Fourth or Forth
Fourth comes from Old English forms such as fēorþa and fēowerþa. It developed from the word for four combined with an ordinal ending. Over time, it became the modern fourth, meaning number four in a sequence.
Forth has a different history. It comes from Old English forþ, with the basic idea of moving forward, outward, or onward. It is related to older Germanic words with similar meanings.
Although the two words eventually became homophones, their meanings remained separate. That is why English has both fourth and forth today.
The spelling difference is therefore not a British-versus-American issue. It reflects the different origins and meanings of the two words.
British English vs American English Spelling
There is no spelling difference between British English and American English for fourth and forth.
Both varieties use fourth for the number four and forth for movement or onward direction.
| Meaning | British English | American English | Example |
|---|---|---|---|
| Number 4 in order | fourth | fourth | She came fourth. |
| One of four parts | fourth | fourth | One fourth of the cake |
| Forward or onward | forth | forth | Go forth and succeed. |
| From a time onward | forth | forth | From that day forth |
| Repeated movement | forth | forth | Back and forth |
One small usage difference is worth noting. Fourth can mean one of four equal parts, especially in American English. British English often uses quarter for this meaning.
For example:
- American English: Three-fourths of the group agreed.
- British English: Three-quarters of the group agreed.
This does not change the spelling of fourth itself.
Which Spelling Should You Use?
Choose the spelling based on meaning, not the country of your audience.
For a US audience
Use fourth when referring to number four, rank, position, or order.
She is the fourth person in line.
Use forth when you mean forward or onward.
The team moved forth with confidence.
For a UK or Commonwealth audience
The same rule applies.
He finished fourth in the race.
They set forth early in the morning.
For a global audience
The safest approach is also the simplest: remember what each word means.
Fourth = number four
Forth = forward or onward
There is no need to choose one spelling based on American or British English. Both forms are standard in both varieties.
Common Mistakes with Fourth or Forth
Because these words sound alike, writers often choose the wrong spelling.
Mistake 1: Using “forth” for number four
❌ She came forth in the competition.
✅ She came fourth in the competition.
The person finished in position number four, so fourth is correct.
Mistake 2: Using “fourth” for forward movement
❌ The soldiers marched fourth.
✅ The soldiers marched forth.
The sentence describes movement, so forth is the correct word.
Mistake 3: Confusing “and so forth”
The correct phrase is:
✅ and so forth
It means “and so on.”
We talked about food, travel, music, and so forth.
Mistake 4: Confusing “back and forth”
The correct phrase is:
✅ back and forth
The children ran back and forth across the yard.
Mistake 5: Writing “fourty”
This is a related spelling trap. The number 40 is spelled forty, not fourty.
However, fourth does keep the “u” from four.
Fourth or Forth in Everyday Examples
Knowing the meaning is easier when you see these words in real situations.
In emails
This is my fourth reminder about the meeting.
Here, fourth refers to number four.
We can now move forth with the project.
Here, forth means onward.
In news writing
The player finished fourth in the final race.
Fourth shows the athlete’s position.
The new plan will move forth after approval.
Forth means forward.
On social media
My fourth coffee of the day! ☕
Time to go forth and chase the dream.
The first example refers to number four. The second suggests moving forward.
In formal writing
The committee reviewed the proposal for the fourth time.
The organization will now set forth a new policy.
Both forms can appear in professional writing when used with the correct meaning.
Common phrases with “forth”
- go forth
- set forth
- bring forth
- put forth
- come forth
- back and forth
- and so forth
- from this day forth
Oxford also lists “forth” as a word used for movement away, outward, or forward.
Common phrases with “fourth”
- fourth place
- fourth floor
- fourth time
- fourth grade
- fourth chapter
- fourth century
- the Fourth of July
Fourth or Forth – Google Trends & Usage Data
Search interest for “fourth or forth” usually comes from people trying to solve a spelling or grammar question. The confusion is natural because the words are pronounced alike.
The broader word fourth has much higher everyday use because it appears in many common contexts. It is used for rankings, dates, floors, school grades, sequences, fractions, and other numerical ideas. Dictionaries list all of these standard uses.
Forth has a narrower range of modern uses. It appears often in fixed expressions such as back and forth, and so forth, set forth, and go forth. Oxford describes it as literary except in particular idioms and phrasal verbs.
Usage also does not change because of location. Writers in the United States, United Kingdom, Canada, Australia, and other English-speaking regions use the same basic distinction:
- fourth → number four
- forth → forward or onward
This means searches for “fourth or forth” are mainly about meaning and spelling, rather than British versus American English.
Fourth vs Forth – Comparison Table
| Word | Meaning | Part of speech | Example | Easy clue |
| Fourth | Number four in order | Adjective/Noun/Adverb | She finished fourth. | Think four |
| Fourth | One of four equal parts | Noun | A fourth of the cake | Think 1/4 |
| Forth | Forward or onward | Adverb | Go forth. | Think forward |
| Forth | Out or into view | Adverb | He came forth. | Think outward |
| Forth | Used in fixed phrases | Adverb | Back and forth | Think movement |
FAQs About Fourth or Forth
1. Is it fourth or forth?
Both words are correct, but they have different meanings. Fourth refers to number four or the fourth position. Forth usually means forward, onward, or out.
2. Is “forth” a spelling of “fourth”?
No. Forth is not an alternative spelling of fourth. They are separate words with different meanings and origins.
3. Is fourth British or American?
Fourth is used in both British and American English. The spelling does not change.
4. Is “go fourth” correct?
No, not when you mean “go forward.” The correct phrase is go forth.
Go forth and do your best.
5. Is “fourth” correct for number four?
Yes. Fourth is the ordinal form of four.
First, second, third, fourth.
6. Why do fourth and forth sound the same?
They are homophones. Their spellings and meanings are different, but their pronunciation is the same or very similar in many varieties of English.
7. How can I remember fourth vs forth?
Use this simple rule:
FOUR = FOURTH
FORWARD = FORTH
If you are talking about position number four, use fourth. If you mean moving forward or onward, use forth.
Conclusion
The difference between fourth or forth is simple once you focus on meaning. Fourth is connected to the number four. Use it for the fourth person, fourth place, fourth floor, fourth time, or another position in a sequence. Forth means forward, onward, or outward, and it appears in phrases such as go forth, set forth, back and forth, and and so forth.
These words are not different British and American spellings. Both British and American English use fourth and forth in the same basic way.
When you are unsure, use the memory trick: four = fourth, forward = forth. This quick rule works in emails, school assignments, social media posts, news writing, and formal documents.
Once you connect each spelling to its meaning, this common homophone confusion becomes easy to avoid.
