Fewer vs less
'Fewer' modifies plural countable nouns (fewer cars, fewer mistakes) and 'less' modifies uncountable nouns (less traffic, less time). The rule is one of the most policed in English, even though native speakers routinely break it in casual signs like '10 items or less'; for IELTS Writing and Speaking, keep the distinction strict.
The rule
Fewer vs less at a glance
Fewer
Less
- Used with
- Plural countable nouns: fewer cars, fewer mistakes, fewer options
- Uncountable nouns: less traffic, less money, less information
- With numbers + a measured unit
- Not used directly before a bare number + unit of measurement
- Standard for amounts, money, distance, time, weight: 'less than $50', 'less than 10 minutes'
- '...than' + countable plural
- Grammatically correct: 'fewer than 20 students'
- Extremely common informally, but considered incorrect in formal writing: 'less than 20 students'
- Example
- Fewer people are smoking than a decade ago.
- There is less pollution than a decade ago.
- Real-world usage
- Preferred by style guides, editors and IELTS examiners
- Common on supermarket signs ('10 items or less') and in casual speech, even with countable nouns
- Comparative of
- few
- little
Which one do I need?
Fewer or less?
Every answer at a glance
fewer
The noun is plural and countable, so use fewer: fewer cars, fewer jobs. Less with countable nouns is informal and marked wrong in exams.
Fewer young people own a car than twenty years ago.
less
The noun is uncountable, so use less: less traffic, less pollution, less information.
The new bus lanes mean there is less congestion at rush hour.
less than
Money, time, distance and weight are measured as one amount, not counted one by one, so they take less even with a number.
The flight from Dhaka to Delhi takes less than three hours.
fewer than
You are counting separate people or items, so use fewer than. Less than here is common in speech and on signs, but not in formal English.
Fewer than 30 students signed up for the evening class.
How to use fewer vs less
What is the difference between fewer and less?
'Fewer' is the comparative of 'few' and belongs with plural countable nouns you can count individually: fewer buses, fewer mistakes, fewer opportunities. 'Less' is the comparative of 'little' and belongs with uncountable nouns you measure rather than count: less traffic, less noise, less confidence.
The test is simple: if you can put a number in front of the noun (three buses, five mistakes), use 'fewer'. If you can't (you can't say 'three traffics'), use 'less'.
- Fewer flights were cancelled this week than last week.flights = countable → fewer
- There was less turbulence on this flight than usual.turbulence = uncountable → less
- There was fewer traffic than expected.→ less traffic, 'traffic' is uncountable
Fewer or less with numbers, money and time?
Numbers get confusing because money, distance, time, weight and age are usually treated as a single measured amount rather than a set of separate countable units, so they take 'less', even though a number follows. 'Less than five years' measures one span of time, not five separate 'years' you're counting individually.
Contrast this with genuinely countable things measured in the same units: 'fewer than five students' counts five distinct people, so 'fewer' is correct. The difference is whether you are counting discrete items or measuring a single quantity.
- The repair cost less than $200.money treated as one amount
- We finished the test in less than an hour.time treated as one span
- Fewer than ten applicants met the deadline.applicants are discrete, countable people
Why do supermarket signs say '10 items or less'?
The most famous violation of the fewer/less rule is the supermarket sign '10 items or less', which should strictly say '10 items or fewer' because 'items' is a plural countable noun. The sign has existed for decades, and most native speakers don't notice anything wrong with it, a sign of how far 'less' has spread into countable contexts in casual English.
Some grammarians argue the phrase isn't a mistake at all, treating the whole expression as a single quantity rather than counting the items one by one. Either way, it remains informal: style guides, newspapers and exam markers still expect 'fewer' with countable nouns in anything resembling formal English.
- Express checkout: 10 items or fewer.the formally 'correct' version
- This queue is for customers with fewer bags.
- This queue is for customers with less bags.→ fewer bags, 'bags' is countable, even on casual signage
Fewer or less, which is safe for IELTS?
For IELTS Speaking and Writing, treat the rule as strict: 'fewer' for anything you could count one by one, 'less' for anything you measure. Examiners and markers are trained to notice this specific slip, and getting it right is an easy, low-effort accuracy point in the Grammatical Range and Accuracy / Lexical Resource criteria.
In Task 1 data description, this distinction comes up constantly when comparing figures: fewer people, fewer countries, fewer units sold (countable) versus less spending, less demand, less unemployment (uncountable).
- Fewer graduates chose engineering in 2020 than in 2010.graduates = countable
- Overall spending on education was less in 2020 than in 2010.spending = uncountable
- Less graduates chose engineering in 2020.→ Fewer graduates, countable nouns need 'fewer', even in fast spoken answers
Common mistakes with fewer vs less
Find what is wrong in each one, then open it to check.
1There were less visitors to the museum this year.What's wrong? Show the fix
There were fewer visitors to the museum this year.
'Visitors' is a plural countable noun, so the comparative must be 'fewer', not 'less'.
2I have fewer money than I thought.What's wrong? Show the fix
I have less money than I thought.
'Money' is uncountable, so it takes 'less'; 'fewer' only modifies plural countable nouns.
3We need less mistakes in the final draft.What's wrong? Show the fix
We need fewer mistakes in the final draft.
'Mistakes' is countable and plural, so 'fewer', not 'less', is correct.
4It took her fewer than an hour to finish the route on a bike.What's wrong? Show the fix
It took her less than an hour to finish the route on a bike.
A single measured span of time ('an hour') takes 'less', not 'fewer', even though a number is involved.
5Less students attended the seminar than expected.What's wrong? Show the fix
Fewer students attended the seminar than expected.
'Students' is countable, so the correct comparative is 'fewer'; this is one of the most common fewer/less errors even among native speakers.
Practise
Write your own
Write a sentence that uses fewer or less, about you, your studies or your town.
Fewer vs less in IELTS
Speaking
- When comparing quantities in Part 3 opinion answers ('Do you think fewer people read books now?'), matching fewer/less to countable/uncountable nouns is a reliable Grammatical Range and Accuracy signal; examiners notice it precisely because so many candidates get it wrong.
- It's safe to mirror examiner phrasing: if they ask 'Are there fewer job opportunities now?', reuse 'fewer' in your answer rather than defaulting to 'less' for everything.
Writing
- In Task 1, describe falling countable data with 'fewer' ('Fewer households owned a car in 1990') and falling uncountable data with 'less' ('Less electricity was consumed in summer'); mixing them up is a common accuracy deduction.
- In Task 2, precise fewer/less use signals careful control of grammar to the examiner; a Band 7+ script rarely, if ever, uses 'less' with a countable plural noun.