Plural of Mouse

by Craig Shrives
The Quick Answer
The plural of mouse is mice.

The plural of computer mouse is computer mice or computer mouses.

The Plural of Mouse

The plural of mouse is mice.
  • Domestic mice sold as pets often differ substantially in size from the common house mouse.
  • Mice and rats have the same organs in the same places, with the difference of size.
Certain plurals do not add a letter to the end, but instead change the word itself. The noun mouse is an example of this. There is no ruling for these types of plurals. You have to learn them.

Be aware that the plural of computer mouse can be computer mice or computer mouses, but computer mice is far more popular.
computer mice or computer mouses?
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plural of mouse

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The Standard Rules for Forming the Plurals

The table below shows the standard rules for forming the plurals of nouns in English.
Type Example of Type Forming the Plural Plural
Most Nouns cat
add s cats
Noun Ending s, sh, ch, x or z bus
add es buses
Nouns ending [consonant] o mango
add either s or es
(There are no rules for this - you have to know.)
mangoes or mangos
Nouns ending [vowel] o patio
add s patios
Nouns ending [consonant] y story
change the y to an i and add es stories
Nouns ending [vowel] y storey ()
add s storeys
Nouns ending f or fe dwarf
ves and/or s
(There are no rules - you have to know.)
Exceptions mouse
some nouns undergo a vowel or letters change mice
More exceptions salmon
some nouns do not change at all salmon
Read more about English spelling rules.

Why Is There Confusion over the Plural of Mouse?

There is confusion because some nouns become different words when they're made plural (usually due to a letter change). There are no easy ways to remember these plurals. They have to be memorized.

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See Also

Unusual pluralsPlural forming table Quirks with forming plurals Forming the plurals of abbreviations Forming the plurals of compound nouns

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