Criteria or Criterion: Which Word Should You Use?

Many English learners confuse “criteria” and “criterion” because the two words look very similar. However, they are not interchangeable.

The difference mainly depends on singular and plural usage. Therefore, using the correct form is important in academic writing, business communication, and everyday English.

Moreover, these words often appear in education, hiring processes, research papers, and decision-making discussions.

If you use the wrong form, your sentence may sound grammatically incorrect.

In this guide, you will clearly learn the meaning, usage, grammar rules, spelling differences, and real-life examples of criteria vs criterion.

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Quick Answer

“Criterion” is singular, while “criteria” is plural.

• Use criterion when talking about one standard or condition.
• Use criteria when talking about multiple standards or conditions.

Correct Example

• Experience is one important criterion for this job.
• The hiring criteria include education and communication skills.

Incorrect Example

• Experience is one important criteria for this job.
• The hiring criterion include education and communication skills.

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Meaning and Usage

The word “criterion” refers to a single rule, standard, or principle used to judge something. Meanwhile, “criteria” refers to more than one rule or standard.

For example, a university may use one criterion for attendance. However, it may use several criteria for final admissions. Therefore, understanding the singular and plural difference is essential.

People commonly use these words in:

• Academic writing
• Job interviews
• Research studies
• Business evaluations
• Performance reviews

For instance:

• Price was the main criterion for choosing the laptop.
• Safety and fuel efficiency were the main criteria for buying the car.

Moreover, native English speakers usually treat “criteria” as a plural noun, so it should take plural verbs.

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Origin and Spelling History

Both “criterion” and “criteria” come from ancient Greek. The original Greek word “kriterion” meant a standard for judging. Later, Latin and English adopted the term into formal writing.

Historically, “criterion” remained singular, while “criteria” became its plural form.

Although modern English sometimes treats “criteria” like a singular word in casual speech, formal grammar still considers it plural.

In addition, these words became especially common in education, philosophy, science, and professional communication.

Today, they are widely used across both British and American English.

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British English vs American English

Both British English and American English use “criterion” and “criteria” in the same grammatical way. However, casual American speech sometimes incorrectly uses “criteria” as singular.

Word	British English	American English	Usage Style
Criterion	Common	Common	Formal and correct singular form
Criteria	Common	Common	Formal plural form

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Spelling Comparison

Word	Number	Meaning	Example Sentence
Criterion	Singular	One standard or rule for judgment	Honesty was the main criterion for selection.
Criteria	Plural	Multiple standards or rules for judgment	The company listed several hiring criteria.

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Which Spelling Should You Use?

You should use “criterion” when discussing one requirement or standard. On the other hand, use “criteria” when discussing multiple requirements.

A simple grammar trick can help:

• Criterion = One
• Criteria = Many

For example:

• If there is only one condition, use criterion.
• If there are several conditions, use criteria.

Moreover, always check the verb in your sentence. “Criterion” usually takes a singular verb, while “criteria” takes a plural verb.

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Common Mistakes

Many writers accidentally mix singular and plural forms. However, these mistakes are easy to avoid once you understand the grammar rule.

Incorrect Usage	Correct Usage	Reason
One of the criteria is attendance.	One of the criterion is attendance.	Only one standard is mentioned.
The criteria was unclear.	The criteria were unclear.	“Criteria” is plural.
The criterion are simple.	The criterion is simple.	“Criterion” is singular.

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Real-Life Examples

Here are some natural examples showing how these words appear in everyday English:

• Communication skills are important criteria for leadership roles.
• Price was the main criterion for selecting the hotel.
• Meanwhile, universities often use multiple admission criteria.
• One important criterion in research is accuracy.
• Furthermore, employers may change hiring criteria over time.

These examples clearly show the singular and plural distinction.

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Helpful Grammar Tips

First, remember that “criterion” is singular and “criteria” is plural. Therefore, your verb must match the noun correctly.

For example:

• The criterion is important.
• The criteria are important.

In addition, avoid using “criterias” because it is grammatically incorrect. The correct plural form is already “criteria.”

Similarly, when writing formal documents or academic papers, always double-check whether you are referring to one standard or many standards.

Finally, reading the sentence aloud can help you notice grammar mistakes more easily.

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FAQs

What is the difference between criteria and criterion?

“Criterion” refers to one standard, while “criteria” refers to multiple standards.

Is “criteria” singular or plural?

“Criteria” is plural and should usually take plural verbs.

Can I say “criterias”?

No, “criterias” is incorrect. The correct plural form is “criteria.”

Which word is more common in academic writing?

Both are common. However, “criteria” appears more often because discussions usually involve multiple standards.

Is it wrong to use “criteria” as singular?

In formal English, yes. Although some people use it casually as singular, grammar rules still treat it as plural.

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Conclusion

Understanding the difference between “criteria” and “criterion” is important for clear and professional English. Although the words are closely related, they serve different grammatical purposes.

“Criterion” refers to one standard, while “criteria” refers to multiple standards or conditions. Therefore, choosing the correct form helps improve accuracy in writing and speaking.

Moreover, these words frequently appear in education, business, research, and daily communication.

Once you remember the singular-versus-plural rule, using them correctly becomes much easier.

Overall, mastering this distinction will make your English sound more polished, natural, and grammatically correct.

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