The words fourth and forth look and sound almost identical, but they do not mean the same thing. This similarity makes them easy to confuse in emails, school assignments, social media posts, and everyday writing.
The key is to understand what each word expresses. Fourth relates to the number four and identifies a position in a sequence. Forth means forward, onward, or outward, depending on the context.
For example, you might write, “This is my fourth visit to New York.” The word fourth tells the reader how many times you have visited the city in order.
However, in the sentence “The team moved forth with its plan,” forth expresses movement or progress. A more common modern version would be “The team moved forward with its plan.”
Both spellings are correct English words. Neither should be treated as a simple misspelling of the other. The mistake happens when a writer chooses one word without considering the intended meaning.
This guide explains the difference between fourth and forth, shows how each word works in a sentence, and provides practical examples to help you choose the right one.
Quick Answer
Fourth means number four in a sequence or position. Forth means forward, onward, or out into view.
Remember these simple examples:
- Correct: Today is my fourth day at work.
- Correct: We went forth to begin our journey.
- Incorrect: Today is my forth day at work.
- Incorrect: We went fourth to begin our journey.
The first pair concerns an ordinal number. The second concerns movement or going onward.
A useful memory trick is to connect fourth with the number four. Both contain the letters four. When you describe the fourth person, fourth day, or fourth place, choose fourth.
Use forth when the idea involves going forward, bringing something out, or moving onward. Expressions such as “and so forth” and “back and forth” also use this spelling.
Although the words sound alike in many American accents, their meanings are different. Checking the sentence’s meaning is the easiest way to avoid confusing them.
Why People Confuse Them
The main reason people confuse fourth and forth is their similar pronunciation. In many varieties of American English, both words sound nearly identical in ordinary speech.
Their spelling also differs by only one letter sequence. Fourth contains the letters four, which connect it to the number four. Forth lacks the u and has a separate meaning associated with movement or direction.
Writers may also rely too heavily on sound when typing. If someone hears a sentence such as “This is the fourth time,” the intended spelling may not be obvious without context.
Another source of confusion is that both words appear in common expressions. People see fourth in phrases such as “fourth grade” and “fourth of July.” Meanwhile, forth appears in expressions such as “come forth,” “go forth,” and “and so forth.”
The words also share some historical background, but their modern uses are distinct. Learning a few familiar expressions can help you recognize the correct spelling more quickly.
For example, if you are talking about a place in a competition, use fourth. If you are describing someone moving ahead, use forth when that word fits the expression.
Key Differences At A Glance
The easiest way to distinguish these words is to focus on their meaning and grammatical role.
| Context | Best Choice | Why |
|---|---|---|
| Position after third | Fourth | It is the ordinal form of four |
| A date or numbered sequence | Fourth | It identifies position or order |
| Moving onward or forward | Forth | It expresses movement or direction |
| “And ___” meaning “and so on” | Forth | “And so forth” is the established expression |
| “Back and ___” | Forth | “Back and forth” describes repeated movement |
| A person’s position in a race | Fourth | It identifies the finishing position |
Quick comparison
- Fourth: An ordinal number related to four.
- Forth: An adverb expressing movement onward or outward.
- Fourth example: “My appointment is on the fourth day of the month.”
- Forth example: “The explorers set forth before sunrise.”
These differences are more important than the similarity in sound. If the sentence refers to a number or position, fourth is generally the right choice. If it expresses movement or appears in a fixed phrase such as “and so forth,” use forth.
Are They the Same Word?
No. Fourth and forth are separate words with different meanings and uses.
Fourth is an ordinal number. Ordinal numbers identify position in a sequence, such as first, second, third, and fourth. It answers a question such as “Which one?” or “What position?”
For example:
“She finished fourth in the spelling competition.”
The sentence tells us that she placed after the first, second, and third competitors.
Forth, by contrast, is most often an adverb. It can express movement forward or outward. It is also part of several established English phrases.
For example:
“The hikers set forth early in the morning.”
Here, forth suggests that the hikers began their journey.
Another example is “The facts came forth during the investigation.” In this sentence, forth expresses the idea of something becoming known or emerging.
The words cannot be freely exchanged. Writing “She finished forth” would be incorrect if you mean that she finished in fourth place. Similarly, “and so fourth” is incorrect when you mean “and so on.”
The right spelling depends on the intended meaning, not on a regional preference.
US vs UK Preference
American and British English use both fourth and forth. Their meanings remain essentially the same in both varieties, and there is no standard American-versus-British spelling difference to remember.
In American English, a student might write, “My younger brother is in fourth grade.” A British writer can use the same spelling when describing the same position in a school sequence.
Likewise, forth appears in established expressions across English varieties. For example, “The group set forth on its journey” uses the word to describe moving onward.
The phrase “and so forth” is also widely understood in both American and British English. It means that a list continues in a similar way, even when the remaining items are not named.
Differences may occur in broader writing habits or in the frequency of certain expressions, but they do not turn fourth and forth into regional spelling variants.
For a US audience, follow the same meaning-based distinction:
- Use fourth for position or order.
- Use forth for movement, onward progress, or established phrases.
You do not need to choose between an American spelling and a British spelling here. Both words belong in standard American English.
Which Word Should You Use?
Choose the word that matches the meaning you want to express.
Use fourth when you are talking about a position in a sequence. It commonly appears with dates, grades, places in a competition, numbered items, and repeated events.
Examples include:
- “Our office is on the fourth floor.”
- “She is the fourth person in line.”
- “The fourth chapter explains the main idea.”
- “He finished fourth in the race.”
- “This is the fourth time I have called.”
In each example, fourth identifies a position or order.
Use forth when you mean forward or onward, or when it is part of a familiar expression.
Examples include:
- “The travelers set forth at dawn.”
- “The children ran forth to greet their parents.”
- “The two friends walked back and forth.”
- “The speaker explained the plan and so forth.”
- “The information came forth during the meeting.”
Some uses of forth sound formal or literary. In everyday American writing, alternatives such as forward, ahead, or out may sound more natural, depending on the sentence.
For instance, “We moved forward with the project” is often more direct than “We moved forth with the project.”
However, familiar phrases such as “back and forth” and “and so forth” are common and natural. You should keep their established spelling rather than substituting fourth.
When One Spelling Looks Wrong
A spelling may look wrong when it does not match the intended meaning. Since fourth and forth sound alike, writers sometimes select the wrong form even when they know both words.
Consider this sentence:
“Today is my forth day at the new job.”
If the writer means the fourth day in a sequence, the correct sentence is:
“Today is my fourth day at the new job.”
The word forth does not identify a numbered position. The sentence requires the ordinal number fourth.
Now consider another example:
“We went fourth into the room.”
If the intended meaning is that the group moved forward or entered, fourth is not appropriate. Depending on the intended meaning, a better sentence would be “We went forth into the world” or, more naturally in many modern contexts, “We moved forward.”
Some errors appear in fixed expressions. For example, “and so fourth” is incorrect when the writer means “and so on.” The correct expression is and so forth.
Similarly, the familiar phrase is back and forth, not “back and fourth.” It describes movement repeatedly in two directions.
These examples show why spelling should follow meaning. Neither word is universally wrong; the problem occurs when one is used in place of the other.
Common Mistakes (and Quick Fixes)
Mistake 1: Using “forth” for a numbered position
Incorrect: “She came forth in the race.”
Correct: “She came fourth in the race.”
Quick fix: If you mean a finishing position, use fourth.
Mistake 2: Writing “fourth” in the phrase “and so forth”
Incorrect: “We need pens, paper, folders, and so fourth.”
Correct: “We need pens, paper, folders, and so forth.”
Quick fix: Memorize the complete phrase “and so forth,” which means “and other similar things.”
Mistake 3: Confusing “back and forth” with a numbered sequence
Incorrect: “The dog ran back and fourth across the yard.”
Correct: “The dog ran back and forth across the yard.”
Quick fix: The phrase describes repeated movement, so use forth.
Mistake 4: Using “forth” for a floor number
Incorrect: “Their apartment is on the forth floor.”
Correct: “Their apartment is on the fourth floor.”
Quick fix: Floors are numbered positions. Use fourth for floor four in an ordered sequence.
Mistake 5: Choosing based on sound alone
Incorrect: “This is the forth time I have tried.”
Correct: “This is the fourth time I have tried.”
Quick fix: Ask yourself whether you mean a number or movement. The meaning determines the spelling.
Mistake 6: Replacing a natural phrase with an awkward one
Awkward: “We went forth with the next step.”
More natural in many everyday contexts: “We moved forward with the next step.”
Quick fix: Forth is correct in some expressions, but forward may be clearer when describing progress in modern American prose.
Everyday Examples
The following examples show how each word works in everyday American English.
Examples using “fourth”
- My birthday is on the fourth of the month.
- She lives on the fourth floor of the apartment building.
- This is the fourth email I have sent today.
- Our team finished fourth in the tournament.
- He read the fourth chapter before going to bed.
- The fourth question was easier than the first three.
- We are meeting on the fourth day of the conference.
- She was the fourth person to arrive at the office.
- The store is located at the fourth intersection.
- He celebrated his fourth year at the company.
- The fourth item on the list needs more attention.
- My younger cousin is in fourth grade.
- They selected the fourth design for the website.
- This is the fourth time the printer has stopped working.
- The runner maintained fourth place until the finish.
Examples using “forth”
- The hikers set forth before sunrise.
- The dog ran back and forth across the yard.
- Please list the remaining items and so forth.
- The group moved forth toward its destination.
- The speaker brought forth several useful ideas.
- The truth gradually came forth during the discussion.
- The children rushed forth to meet their grandparents.
- The explorers went forth into unfamiliar territory.
- She rocked back and forth while waiting for the bus.
- The company moved forward with its plan rather than using the more formal phrase “moved forth.”
- The leader called forth volunteers for the project.
- The team put forth its best effort.
- He stepped forth to introduce the guest.
- The proposal brought forth several questions.
- They continued forth on their journey, though “continued onward” might sound more natural in many modern contexts.
The examples also show that some uses of forth are more formal than others. Expressions such as “back and forth,” “put forth,” and “and so forth” remain familiar in everyday English.
Dictionary-Style Word Details
Verb
Fourth: Fourth is not normally used as a verb in standard American English when it refers to the ordinal number.
Forth: Forth is not normally a verb by itself. It generally functions as an adverb, although it appears in verb phrases such as “put forth” and “bring forth.” In those phrases, the verbs are put and bring, while forth adds meaning to the expressions.
Noun
Fourth: As a noun, fourth can refer to one of four equal parts. For example, “A fourth of the pizza was left.” It can also refer to the fourth item or person in a sequence when the context makes that meaning clear.
Forth: Forth is not commonly used as an ordinary noun in standard American English. Its common use is as an adverb or as part of established expressions.
Synonyms
Fourth: When fourth identifies a position, there is no exact synonym that preserves the same ordinal value in every context. Depending on the sentence, a plain alternative might be “in fourth place” or “number four in the sequence.”
When fourth means one of four equal parts, a close alternative is “one-quarter,” where the context supports that meaning.
Forth: Depending on the context, closest plain alternatives include forward, onward, out, or ahead. These words are not interchangeable in every expression. For example, “back and forth” has a well-established form and should not be casually rewritten as “back and forward.”
Neither word has a single antonym that works in every context. The opposite of forth may be back in a movement context, while the opposite of fourth depends on the particular sequence or comparison.
Example Sentences
Fourth:
- “Our flight leaves on the fourth day of the trip.”
- “He placed fourth in the final race.”
- “The fourth section contains the instructions.”
- “One fourth of the class chose the same answer.”
Forth:
- “The group set forth early in the morning.”
- “The children moved back and forth between the rooms.”
- “She put forth a practical suggestion.”
- “The details came forth after further discussion.”
The spelling changes with the meaning, even when the words sound alike.
Word History
Fourth: The word fourth is related to four and is used to express the ordinal position associated with that number. Its spelling preserves the connection to the number.
Forth: The word forth has a long history in English and is associated with the idea of moving forward or onward. It appears in established phrases that have continued into modern English.
Although the words look and sound similar, their present-day meanings are distinct. Their historical relationship does not make them interchangeable spellings.
Phrases Containing
Fourth:
- Fourth place
- Fourth floor
- Fourth grade
- Fourth time
- Fourth quarter
- Fourth chapter
- Fourth position
- Fourth of July
Examples: “Our office is on the fourth floor.” “We will review the fourth chapter tomorrow.”
Forth:
- Back and forth
- And so forth
- Set forth
- Put forth
- Bring forth
- Come forth
- Go forth
- Call forth
Examples: “The children ran back and forth.” “The team put forth a strong effort.” “Please include the main details and so forth.”
These expressions make the distinction easier to remember. When the phrase is about a numbered position, fourth is generally the right choice. When it expresses movement or belongs to a familiar expression, forth may be the correct word.
FAQs
What is the difference between fourth and forth?
Fourth refers to the number four in a sequence, while forth means forward, onward, or outward. For example, “She finished fourth” and “They set forth early.”
Is fourth or forth correct?
Both words are correct, but they have different meanings. Use fourth for a position or order and forth for movement or expressions such as “back and forth.”
How do you use fourth in a sentence?
Use fourth to identify the position after third. For example, “My office is on the fourth floor.”
How do you use forth in a sentence?
Use forth to express movement onward or as part of an established phrase. For example, “The travelers set forth at sunrise.”
Is fourth the same as forth?
No. They sound alike in many American English accents, but their meanings differ. Fourth relates to the number four, while forth relates to moving onward or outward.
Should I write “back and forth” or “back and fourth”?
The correct expression is back and forth. It describes movement repeatedly in two directions, such as a person walking between two rooms.
Is it “and so forth” or “and so fourth”?
The correct phrase is and so forth. It means “and other similar things” or “and so on.”
Is it fourth floor or forth floor?
The correct phrase is fourth floor. The word fourth identifies a position in a numbered sequence.
Is fourth used in American English?
Yes. Fourth is standard in American English and is used for numbered positions, dates, grades, and places in competitions.
Is forth used in American English?
Yes. Forth is a standard English word used in expressions such as “back and forth,” “set forth,” and “put forth.”
Conclusion
Fourth and forth are both correct English words, but they have different meanings. Fourth refers to a position in a sequence or one of four equal parts. Forth expresses movement onward or outward and appears in phrases such as “back and forth,” “set forth,” and “and so forth.”
The most reliable way to choose is to consider the sentence. If you are talking about a floor, grade, place in a race, or numbered item, use fourth. If you mean onward movement or are using an established expression, choose forth.
Remember these two examples:
- “She finished fourth in the competition.”
- “The travelers set forth at sunrise.”
With regular practice, you can distinguish the words easily and avoid common spelling mistakes in your writing.
