How to Tell if a Noun is Countable or Uncountable | Examples

Uncountable nouns, also known as mass nouns or noncount nouns, refer to a mass of something or an abstract concept that can’t be counted (except with a unit of measurement). In contrast, countable nouns can be counted as individual items.

The main rules to remember for uncountable nouns are that they cannot be pluralized, and that they never take indefinite articles (“a” or “an”).

Countable noun or uncountable noun?

Some nouns in English, like those in the table above, are always (or nearly always) uncountable. Many other nouns, however, can be countable or uncountable depending on the context.

To identify whether a noun is countable or uncountable in a particular context, consider whether you are referring to a single tangible item, entity or type of something, or if you are describing a general mass or idea of something.

Are uncountable nouns singular or plural?

Uncountable nouns should be treated as singular, and thus should always be used with singular verbs to ensure correct subject-verb agreement.

• Knowledges are power.
• Knowledge are power.
• Knowledge is power.

Using articles with uncountable nouns

Singular countable nouns generally require an article or other determiner (e.g., “the interview,” “a participant,” “my hypothesis”). Uncountable nouns, in contrast, can usually stand alone without an article.

Because uncountable nouns can’t be counted as a single item, indefinite articles (“a” or “an”) should never be used with them.

• The admissions office can provide an advice about arranging accommodation.
• The admissions office can provide advice about arranging accommodation.

The definite article “the” can be used when you are referring to a particular instance or specific mass of an uncountable noun.

• All living things require water to survive.
• We wanted to swim but the water was too cold.

Numbers and amounts

Many uncountable nouns are associated with words that break them up into countable units. This is helpful when you want to refer to a single or numbered instance or unit.

• A piece of advice.
• A head of broccoli.
• A bolt of lightning.
• Ten items of feedback.

Finding the correct term to describe amounts can be tricky. Many terms that describe amount (e.g., “some,” “a lot of” and “most”) can be used with both uncountable and countable nouns (although note that these terms are often too vague to use in academic writing).

• Uncountable: Some vegetation has started to grow over the study site.
• Countable: Some chickens have also been spotted in the area.
• Uncountable: After 5 minutes most of the calcium carbonate should be dissolved.
• Countable: Most of the chemicals are not easy to obtain.

However, there are certain terms that can only be used with either uncountable or countable nouns. Make sure to choose correctly between “less”/”fewer,” “much”/”many,” and “amount”/”number.”

“Research” and “data”

In academic writing, “research” and “data” are two uncountable nouns that are notoriously difficult to use correctly.

Never add “s” to pluralize “research” or “data”. (Note that the word “researches” is only correct when used as the third-person singular of the verb “to research.”)

• We review researches about the financial crisis of 2007.
• We review research about the financial crisis of 2007.
• The experiments produced a large amount of datas.
• The experiments produced a large amount of data.

Always use “research” as a singular noun.

• Research are lacking in this area.
• Research is lacking in this area.

Data, however, can be used as a singular or plural noun.

• Data was collected through semi-structured interviews.
• Data were collected through semi-structured interviews.