When to Use less or fewer in English

If you are unsure whether to use less or fewer, the direct answer is this: use fewer with things you can count individually (countable nouns) and less with things you cannot count individually (uncountable nouns). For example, you have fewer apples but less water. This rule works for most everyday situations, though there are a few important exceptions that we will cover below.

Quick Answer: less vs. fewer

Here is the simplest way to decide:

• Fewer + countable plural noun (e.g., fewer chairs, fewer mistakes, fewer emails)
• Less + uncountable noun (e.g., less time, less sugar, less information)

If you can put a number in front of the noun (three chairs, five mistakes), use fewer. If you cannot easily count it, use less.

When to Use fewer

Use fewer when you are talking about individual items or people that can be counted. This is the standard rule in formal English and is expected in professional writing, emails, and academic contexts.

Examples with countable nouns

• We received fewer applications this year than last year.
• She made fewer errors in her second draft.
• There are fewer students in the afternoon class.

In each case, you can count the items: applications, errors, students. Using less here would sound informal or incorrect to many readers.

When to Use less

Use less with uncountable nouns—things that are measured as a whole rather than counted individually. This includes abstract concepts, substances, and collective amounts.

Examples with uncountable nouns

• I need less coffee if I want to sleep tonight.
• He has less patience than his brother.
• This recipe calls for less salt.

You cannot say “one coffee” or “two patiences” in the same way you count apples. That is your clue to use less.

Comparison Table: less vs. fewer

Important Exceptions: When less Is Correct with Countable Nouns

Even careful speakers and writers use less with countable nouns in a few specific situations. These are not mistakes—they are standard English.

1. Measurements and amounts

When you talk about distance, time, money, or weight as a single quantity, use less even if the noun is countable.

• It costs less than twenty dollars.
• The trip takes less than five hours.
• He weighs less than 70 kilograms.

Here, “twenty dollars” is treated as one amount, not twenty individual dollars.

2. “Less than” before numbers

Use less than before a number or percentage.

• Less than 10% of the staff attended.
• We have less than 50 items in stock.

3. Fixed phrases and informal use

Some common phrases use less with countable nouns, especially in informal conversation.

• I want less drama in my life.
• He ate less chips than I did. (informal; “fewer chips” is more formal)

Formal vs. Informal Tone

In formal writing—such as business emails, reports, or academic papers—stick to the rule: fewer for countable nouns, less for uncountable. In casual conversation or informal messages, many native speakers use less for everything. For example, “I have less friends than I used to” is common in speech but would be corrected in formal writing to “fewer friends.”

If you are writing an email to a client or a supervisor, choose fewer for countable nouns. It shows attention to detail and sounds more professional.

Natural Examples in Context

Here are examples that show how the choice affects meaning in real situations.

• Email context: “We need fewer meetings and less paperwork to improve productivity.”
• Conversation: “I have less energy today. Let’s take fewer breaks so we can finish early.”
• Writing: “The report contains fewer errors than the previous version, but it needs less technical jargon.”
• Shopping: “Buy fewer items but spend less money overall.”

Common Mistakes

Even advanced learners sometimes mix these up. Here are the most frequent errors.

• Mistake: “I have less books than you.”
  Correction: “I have fewer books than you.” (Books are countable.)
• Mistake: “There are less people here today.”
  Correction: “There are fewer people here today.” (People are countable.)
• Mistake: “I need fewer water for this recipe.”
  Correction: “I need less water for this recipe.” (Water is uncountable.)
• Mistake: “He has fewer patience than his sister.”
  Correction: “He has less patience than his sister.” (Patience is uncountable.)

Better Alternatives for Common Confusions

If you are still unsure, here are simple replacements that always work.

• Instead of “less people,” say fewer people.
• Instead of “fewer traffic,” say less traffic.
• Instead of “less mistakes,” say fewer mistakes.
• Instead of “fewer information,” say less information.

When in doubt, ask yourself: Can I count this noun? If yes, use fewer. If no, use less.

Mini Practice: less or fewer?

Choose the correct word for each sentence. Answers are below.

1. We need ________ chairs for the meeting. (less / fewer)
2. She drinks ________ coffee than her husband. (less / fewer)
3. There are ________ cars on the road today. (less / fewer)
4. He has ________ than ten dollars in his wallet. (less / fewer)

Answers:

1. fewer (chairs are countable)
2. less (coffee is uncountable)
3. fewer (cars are countable)
4. less (ten dollars is treated as an amount)

Frequently Asked Questions

1. Can I use “less” with countable nouns in informal English?

Yes, many native speakers use less with countable nouns in casual conversation. For example, “I have less friends now” is common in speech. However, in formal writing or professional emails, it is safer to use fewer with countable nouns.

2. Is “less than 10 items” correct?

Yes. When referring to a number, amount, or measurement, less than is standard. So “less than 10 items” is correct, even though “items” is countable. This is one of the accepted exceptions.

3. What about “one less” or “one fewer”?

Both are used, but one less is more common in everyday English. For example, “I have one less problem now.” In very formal writing, “one fewer” may appear, but it sounds stiff. Stick with one less in most situations.

4. Do I use “less” or “fewer” with percentages?

Use less than before a percentage. For example, “Less than 20% of the students passed.” Even though “students” is countable, the percentage is treated as a single amount.

Final Tip for Real Writing and Conversation

If you are writing a formal email, a report, or an academic paper, follow the rule strictly: fewer for countable nouns, less for uncountable. If you are speaking casually or texting a friend, you can relax the rule. The most important thing is to be understood. When you choose the right word, your English sounds more natural and precise.

For more help with similar word pairs, explore our Usage Confusions guides. You can also check our Grammar Word Differences section for other common choices. If you have questions about this guide, visit our contact page or read our FAQ for more answers.