It’s a unit. The rule for using “a” or “an” is based on pronunciation, not spelling.
It’s a unit. The rule for using “a” or “an” is based on pronunciation, not spelling. Since the initial letter of the word unit makes a consonant sound, a “you” sound, it takes the indefinite article “a”.
A pound is a unit of weight.
A pound is an unit of weight.
More examples:
A unit is the amount of a drug that is needed to produce a specific effect.
The team works as a unit.
When using an adjective before “unit”, put “an” if the first letter of the following word makes a vowel sound; thus, we say “a unit” but “an air conditioning unit”.
A unit is just a single item; for example, it may be an air conditioning unit.
A partial list of words that begin with the vowel “u” but take the article “a”:
