Use amount with uncountable nouns (a large amount of money). Use number with countable nouns (a large number of people).
The Core Difference
“Amount” refers to a quantity of something uncountable — measured as a mass rather than individual units: a small amount of water, the amount of time available.
“Number” refers to a quantity of something countable — items you can enumerate one by one: a large number of students, the number of complaints increased. This follows the exact same countable/uncountable logic as “fewer” (countable) and “less” (uncountable).
- uncountable nouns → amount: a huge amount of work, money, time
- countable nouns → number: a huge number of jobs, people, days
Amount and Number in Context
The amount of rainfall this year has been unusual.
A large number of students passed the exam.
We need to reduce the amount of waste we produce.
The number of applicants doubled this year.
The amount of traffic increased along with the number of accidents.
Common Mistakes
| Incorrect | Correct | Why |
|---|---|---|
| ✗ a large amount of people | ✓ a large number of people | people = countable |
| ✗ the number of money we saved | ✓ the amount of money we saved | money = uncountable |
| ✗ a huge number of information | ✓ a huge amount of information | information = uncountable |
| ✗ the amount of jobs available | ✓ the number of jobs available | jobs = countable |
| ✗ a small number of water | ✓ a small amount of water | water = uncountable |
NUMBER goes with things you can NUMBER, one by one (1 student, 2 students — number of students). AMOUNT goes with things you measure as a mass (an amount of water, money, time). This is exactly the same test used for fewer/less.
Related Questions
- Amount vs Number — full confusing-words comparison page with additional examples and exercises.
- All Confusing Words — browse all 300+ word-pair guides.
- All Questions — more quick-answer pages.
- Grammar Quiz — test your knowledge of confusing word pairs.
Frequently Asked Questions
What is the core rule for amount vs number?
“Amount” is used with uncountable nouns — things measured as a mass, like money, water, time, or information. “Number” is used with countable nouns — things you can count individually, like people, jobs, or items. This mirrors the fewer/less distinction exactly.
Is this the same rule as fewer vs less?
Yes, exactly — amount pairs with uncountable nouns just as “less” does, and number pairs with countable nouns just as “fewer” does. If you already know the fewer/less rule, you already know the amount/number rule.
Is a number of people or an amount of people correct?
“A number of people” is correct, because “people” is a countable noun — you can count individuals one by one. “An amount of people” is a common but incorrect error.
Is the amount of money or the number of money correct?
“The amount of money” is correct, because money (as a general concept, not individual coins/notes) is treated as uncountable. “The number of money” is incorrect.
Can number ever describe something uncountable?
No — “number” specifically requires a plural countable noun (number of days, number of cars). If the noun cannot be counted individually, “amount” is the only correct choice.
Is a number of used with a singular or plural verb?
“A number of” is typically followed by a plural verb, because it functions similarly to “several” or “many”: “A number of students are absent today” (not “is absent”).
What is the difference between the number of and a number of?
“The number of” refers to the specific total count and takes a singular verb: “The number of students has increased.” “A number of” means “several/many” and takes a plural verb: “A number of students have complained.”
Is amount of time or number of time correct?
“Amount of time” is correct, because “time” in this general sense is uncountable. “Number of times” (referring to countable occasions/repetitions) is different and also correct: “the number of times he called” refers to countable occurrences.
Why do learners often confuse amount and number?
Because both words translate to a single, undifferentiated “quantity” word in many other languages, learners often fail to apply the countable/uncountable distinction that English requires, leading to frequent swaps between the two words.
Is this distinction important in academic and business writing?
Yes — correctly distinguishing amount and number, like fewer and less, is considered a marker of careful, accurate writing in academic papers, business reports, and exams such as IELTS, where countable/uncountable noun agreement is specifically assessed.