Fewer vs. Less
The traditional distinction uses “fewer” with plural countable nouns and “less” with uncountable nouns, amounts, and degree. Modern informal speech also uses “less” with plural countable nouns, but Cambridge notes that this is traditionally not considered correct in formal standard usage.
Use “fewer” with plural countable things (“fewer cars”) and “less” with uncountable amounts (“less traffic”) as the standard formal rule. Informal speech often extends “less” to plural count nouns, so context and register matter.
Key details
Choose the right form
| Noun/context | Standard formal choice | Example |
|---|---|---|
| plural countable noun | fewer | fewer cars / fewer mistakes |
| uncountable noun or amount | less | less traffic / less work |
| degree or adverbial comparison | less | less difficult / costs less |
| plural count noun in informal speech | less occurs | fewer remains the traditional formal choice |
The count/mass distinction is a useful formal rule of thumb, but informal usage and fixed expressions can be broader; do not label every plural “less” construction as impossible English.
Further guidance
Core Rule
Cambridge states the usual distinction as less with uncountable nouns and fewer with plural nouns.
Modern Informal Usage
Less is often heard with plural countable nouns in informal speech, although Cambridge labels fewer as the traditionally correct form in that construction.
Practical Examples
“Less work” and “less traffic” refer to amounts; “fewer cars” and “fewer mistakes” refer to countable plural items.
With Of
Before articles, demonstratives, possessives, or pronouns, use “less of” with singular/uncountable reference and “fewer of” with plural reference.
Sources and evidence
Sources are shown with the role they play in this guide. Historical or style-sensitive claims are kept within the evidence boundary described above.
- Less or fewer? — Cambridge Grammar (opens in a new tab)Cambridge University Press · Countability distinction and modern informal usage