The Definitive Guide to “Fewer” vs “Less” for ESL Learners

Introduction

Do you ever hesitate when choosing between fewer and less? You are not alone. Even native speakers often mix them up, especially in casual conversation. However, using the wrong word can make your English sound less precise. In this guide, you will learn the simple rule, important exceptions, and common mistakes that B1–B2 learners make. By the end, you will feel confident using fewer and less correctly every time.

What Is the Difference Between “Fewer” and “Less”?

Both fewer and less are comparative words that mean “a smaller amount or number.” The key difference is the type of noun they describe:

• Fewer is used with countable nouns (things you can count individually, like apples, books, people).
• Less is used with uncountable nouns (things you cannot count individually, like water, time, money).

Think of it this way: if you can put a number in front of the noun (e.g., three apples), use fewer. If you cannot (e.g., some water), use less.

Rules

1. Use “fewer” with countable plural nouns. Countable nouns have singular and plural forms. For example: fewer chairs, fewer mistakes, fewer opportunities.
2. Use “less” with uncountable nouns. Uncountable nouns do not have a plural form. For example: less sugar, less traffic, less information.
3. Use “less” with numbers and measurements. When referring to distance, time, money, or quantity as a whole, use less. Example: less than five miles, less than ten dollars.
4. Use “fewer” when you can count individual items. Even if the number is large, if each item is separate, use fewer. Example: fewer than 1000 people.
5. Use “less” with percentages and fractions when the reference is uncountable. Example: less than 20% of the water (water is uncountable). But: fewer than 20% of the students (students are countable).

How to Use It

Follow these three simple steps:

1. Identify the noun. Is it countable (e.g., cups, cars, errors) or uncountable (e.g., coffee, patience, rain)?
2. Check if the noun is plural. Countable nouns used with fewer must be plural. Uncountable nouns are always singular in form.
3. Choose the correct word. If the noun is countable and plural, use fewer. If it is uncountable, use less.

Example:
– “I have fewer books than my sister.” (Books are countable.)
– “I have less patience than my sister.” (Patience is uncountable.)

Examples in Sentences

• She made fewer mistakes on the second test.
• We need less sugar in this recipe.
• There are fewer students in class today.
• He drinks less coffee than he used to.
• I have fewer chores to do this weekend.
• You should eat less fast food for your health.
• They received fewer applications this year.
• We have less time to finish the project.
• There are fewer cars on the road during the holiday.
• She has less experience than her colleague.
• Please use fewer plastic bags when shopping.
• He has less money after buying the new phone.

Common Mistakes

Here are five frequent errors ESL learners make, with corrections:

• Mistake 1: ❌ “I need less apples.”
  ✅ Correct: “I need fewer apples.” (Apples are countable.)
• Mistake 2: ❌ “There are less people here.”
  ✅ Correct: “There are fewer people here.” (People are countable, though the word “people” is plural.)
• Mistake 3: ❌ “She has fewer patience than me.”
  ✅ Correct: “She has less patience than me.” (Patience is uncountable.)
• Mistake 4: ❌ “I have fewer than ten dollars.”
  ✅ Correct: “I have less than ten dollars.” (Money is a measurement/amount, not individual dollar bills.)
• Mistake 5: ❌ “We need fewer water for the experiment.”
  ✅ Correct: “We need less water for the experiment.” (Water is uncountable.)

Quick Summary

• Fewer + countable plural nouns (e.g., fewer chairs, fewer problems).
• Less + uncountable nouns (e.g., less milk, less traffic).
• Less + numbers, distances, money, time (e.g., less than five minutes).
• Always check if the noun can be counted individually.
• When in doubt, think: “Can I say ‘three ___’?” If yes, use fewer.

Practice Exercises

Fill in the blanks with fewer or less:

1. I need _______ sugar in my tea.
2. She has _______ friends than her brother.
3. There is _______ traffic on Sundays.
4. We have _______ than twenty minutes to finish.
5. He made _______ errors on the report.

Answers:

1. less (sugar is uncountable)
2. fewer (friends are countable)
3. less (traffic is uncountable)
4. less (time is a measurement)
5. fewer (errors are countable)

Conclusion

Mastering fewer vs less is a small but powerful step toward more accurate English. Remember the basic rule: countable nouns get fewer, uncountable nouns get less—with a few exceptions for measurements. Practice with real sentences, and soon it will become automatic. Keep up the great work, and your grammar will shine!

FAQ

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

Yes, many native speakers use less with countable nouns in casual speech (e.g., “I have less books”). However, in formal writing and exams, you should always follow the rule: use fewer for countable nouns. Stick to the standard rule for B1–B2 level accuracy.

2. Is “fewer” always correct with “people”?

Yes, people is a countable plural noun (one person, two people). So use fewer people. For example: “There were fewer people at the concert last night.” Avoid “less people” in formal English.

3. What about “less than 10%”? Should it be “fewer”?

It depends on the noun that follows the percentage. If the noun is uncountable, use less (e.g., “less than 10% of the water”). If the noun is countable, use fewer (e.g., “fewer than 10% of the students”). Always look at the noun, not the percentage.

4. Why do supermarkets say “10 items or less”?

This is a common exception in English. Supermarkets often use less because “items” is treated as a total quantity or measurement, not as individual countable items. However, grammatically, it should be “10 items or fewer.” Many grammarians accept this usage as an idiomatic exception in signage, but for your writing, stick to the standard rule.