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HomeWhich One?GrammarCriterion vs Criteria
ESEN
Which one to use?Advancednounsustantivo (plural)

CriterionvsCriteria

'Criterion' is the singular (one standard); 'criteria' is the plural (two or more standards).

Side-by-side comparison

Criterion
noun

"Criterion" is the singular: one single requirement or standard for evaluating something. Do not use it when referring to more than one.

  • The only criterion for joining the club is that you must be over eighteen.

  • Price was the most important criterion in her decision to switch providers.

  • What is the main criterion used to evaluate performance in this department?

Criteria
sustantivo (plural)

"Criteria" is the plural. A very widespread mistake is using it as singular: "this criteria is" is wrong. The correct form is "these criteria are".

  • The selection committee will use several criteria to evaluate the candidates.

  • The criteria for admission to the program are listed on the university website.

  • All three criteria must be met before the application can move to the next stage.

Common mistake

  • •"The criteria is experience" has two errors: "criteria" is plural and needs a plural verb ("criteria are"), and a single standard is "criterion".
  • •The same pattern applies to: datum/data, phenomenon/phenomena, curriculum/curricula.

Trick to remember it

  • •Ends in -ON = singular: one criterion, one phenomenon, one datum.
  • •Ends in -A = plural: criteria, phenomena, data.
  • •"Criteria are" always, just like "data are" in formal writing.

Quick rule

  • •"Criterion" = singular (one standard).
  • •"Criteria" = plural (two or more standards).
  • •"Criteria" always takes a plural verb: "criteria are", "criteria include".

Did you know?

English words ending in "-on" with plural "-a" come from Greek: criterion/criteria, phenomenon/phenomena, automaton/automata. Words ending in "-um" with plural "-a" come from Latin: datum/data, medium/media, curriculum/curricula, memorandum/memoranda. In modern English, many of these are being replaced by anglicized "-s" plurals (curriculums, mediums), but in formal academic and professional writing the classical forms are still expected.

Practise what you learned

Exercise 1 · Pick the right one

Price was the main _____ she used when choosing which laptop to buy.

Exercise 2 · Pick the right one

The judges used several _____ to select the winner: originality, technique, and presentation.

Exercise 3 · Form the word

Complete: "What are your _____ for choosing a new flat? Location, price, or size?" (criterion / criteria)

Related word pairs

LessvsFewer

One reduces uncountable things, the other reduces countable things.

NumbervsAmount

"Number" is used for things that can be counted individually; "amount" is used for things that cannot be counted (masses or quantities).

AvsAn

'A' is used before consonant sounds; 'an' is used before vowel sounds.

A lot ofvsMany

'A lot of' works for countable and uncountable; 'many' only for countable; 'much' only for uncountable.

BL

Bryan López

Founder of SpeakUP Academy

July 24, 2026

See all Grammar pairsExplore English suffixes
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