Quick answer: “Fewer” is for things you can count individually. “Less” is for amounts you can’t count one by one. “Fewer apples” (you can count each apple) vs. “less water” (you can’t count individual units of water).
This is one of the most commonly broken grammar rules in English — even supermarket “10 items or less” signs get it wrong (it should technically be “10 items or fewer”). Here’s the rule that actually settles it, plus where the line gets genuinely blurry.
| Term | Meaning / When to use | Example sentence |
|---|---|---|
| Fewer | Countable nouns — things you could count one at a time. | “I have fewer emails to answer today.” |
| Less | Uncountable nouns — amounts, quantities, or singular mass concepts. | “I have less time than I thought.” |
When to use Fewer
Use “fewer” for plural, countable things — anything you could physically count one, two, three. If the noun has a plural form (apples, people, cars, mistakes), “fewer” is correct.
- “There are fewer cars on the road this morning.”
- “She made fewer mistakes on the second try.”
- “We have fewer options than we did last year.”
When to use Less
Use “less” for singular, uncountable nouns — things measured in bulk or degree rather than counted individually: water, time, money, patience, traffic.
- “I have less patience after a long day.”
- “There’s less traffic on weekends.”
- “He spends less money now than he used to.”
The Simple Test
Ask: can I put a number directly in front of this noun? “Three apples” works, so use fewer. “Three water” doesn’t work, so use less. If the noun needs a unit of measurement to be counted (a glass of water, a cup of sugar), treat it as uncountable and use less.
Common Mistakes and Exceptions
Money, distance, weight, and time are the trickiest exceptions — they’re technically countable (you can count dollars, miles, pounds, minutes) but conventionally take “less” when referring to them as a single amount: “less than $10,” “less than 5 miles,” “less than an hour.” The rule of thumb: when the number+unit functions as one single amount rather than individual items, “less” sounds more natural even though the strict grammar rule would suggest “fewer.”
Frequently Asked Questions
Is “10 items or less” grammatically correct?
A: Strictly speaking, no — “items” is countable, so “10 items or fewer” is technically correct. But “10 items or less” is so widely used it’s now broadly accepted in casual usage.
Is it “less people” or “fewer people”?
A: “Fewer people” — people are countable individually, so this is one of the clearest cases where the rule applies without exception.
Why does this rule feel so easy to break?
A: Because “less” sounds natural in almost any context to native speakers, while “fewer” can feel oddly formal — which is exactly why so many signs and casual writers default to “less” even when it’s not technically correct.
