Criterion and criteria often cause confusion because they look similar and usually appear in formal writing. The key difference is simple: criterion is singular, while criteria is plural. Once you know what words and verbs go with each form, the distinction becomes clear.
Criteria vs. Criterion
When to Use Criterion (Singular)
Criterion is a singular noun. It means a single standard or principle used to judge or decide something.
Criterion usually appears with a, this, each and takes a singular verb (is).
Criterion Examples:
- Academic ability is not the only criterion for admission.
- This criterion is essential for the final decision.
- Experience is the main criterion for this role.
When to Use Criteria (Plural)
Criteria is the plural form of criterion. It refers to two or more standards.
Criteria often appears with these, many, several and takes a plural verb (are).
Criteria Examples:
- The selection criteria are very strict.
- These criteria are used to evaluate applicants.
- What are the main criteria for success?
Criterion vs. Criteria in Context
- Honesty is an important criterion in leadership.
- Our main criterion is customer satisfaction.
- Schools use different criteria to measure student performance.
- The criteria are clearly stated in the guidelines.
A simple rule to remember:
- Criteri-ON → singular (think ONE)
- Criteri-A → plural (think A LOT)
Final tip:
If you are talking about one standard, use criterion. If you mean more than one, use criteria. Always check the verb that follows—it will guide you to the correct choice.
Last Updated on March 2, 2026
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