Cardinal and Ordinal Numbers: Definition and Examples

Do you ever get confused between “three” and “third” or wonder when to use “ten” versus “tenth”? You’re not alone! 

Understanding the difference between cardinal and ordinal numbers is a key part of mastering everyday English. 

These numbers pop up more often than you think, like when counting objects, scheduling events, or simply trying to express order. 

Let’s break down what they are, how they work, and how to use them with confidence in real-life situations.

What are Cardinal Numbers?

Cardinal numbers are the basic numbers we use to count and tell how many of something there are. 

They answer the question “how many?” and include numbers like one, two, three, four, and so on. 

You use them when you're counting apples, books, or people in a room.

They're essential in everyday conversations, shopping, time-telling, and more.

What are Ordinal Numbers?

Ordinal numbers are used to show the position or order of something in a list. 

Instead of telling us how many, they tell us which one–like first, second, third, and so on. 

You use ordinal numbers when talking about dates (e.g., July 4th), competitions (e.g., she came in third), or steps in a process (e.g., the second step is...). 

They help organize and sequence events clearly.

List of Cardinal Numbers and Ordinal Numbers in English

These numbers form the basis of how we count and sequence everything around us, from simple tasks to complex instructions: 

Examples of Cardinal and Ordinal Numbers in Sentences

Here are examples of sentences with cardinal and ordinal numbers to help illustrate how each type is used in real life:

Sentences with Cardinal Numbers 

• I have two dogs and one cat.
• She bought three books from the bookstore.
• They invited ten people to the party.
• He drank five cups of coffee today.
• There are seven days in a week.

Sentences with Ordinal Numbers 

• He finished in first place in the race.
• My birthday is on the twentieth of June.
• This is the third time I’ve seen that movie.
• Their office is on the seventh floor.
• She was the fourth person to arrive.

Cardinal Numbers 1–100: Full Table with Patterns

Learning cardinal numbers in English is easier when you understand the patterns. Here is a complete reference table from 1 to 100:

The pattern for 21–99: Say the tens word, add a hyphen, then the units word. For example: 25 = Twenty-five, 48 = Forty-eight, 73 = Seventy-three.

Ordinal Numbers 1–31: Full Table

Ordinal numbers 1–31 are especially useful for talking about dates. Here is a complete reference:

How to Say Large Numbers in English

Once you go beyond 100, English numbers follow a clear pattern. Here is how to build them:

Tip: In British English, "and" is used after "hundred" (e.g., two hundred and fifty). In American English, the "and" is often omitted (e.g., two hundred fifty).

Numbers in Dates and Addresses

In everyday English, ordinal numbers appear constantly in dates and addresses:

• Dates (spoken): We always say the ordinal form when speaking a date.
  "My appointment is on the third of April."
  "Her birthday is on May twenty-first."
• Dates (written): You can write the date with or without the ordinal ending, depending on style.
  Formal: 3rd April or April 3rd
  Informal: April 3
• Addresses (cardinal): Street numbers use cardinal numbers.
  "I live at 45 Oak Street."
• Floor numbers (ordinal): Floor levels use ordinal numbers.
  "The office is on the seventh floor."

Common Mistakes with Numbers

Here are the most frequent errors learners make — and how to fix them:

• ❌ "twenty one" → ✅ "twenty-one"
  All compound numbers from 21 to 99 require a hyphen when written as words.
• ❌ "fourty" → ✅ "forty"
  There is no "u" in forty — this surprises many learners!
• ❌ "the fifth floor" / "the 5th floor" (both are correct!)
  Either form is acceptable in writing.
• ❌ "one thousand and five hundred" → ✅ "one thousand five hundred"
  "And" connects hundreds to smaller numbers, not thousands to hundreds.
• ❌ "the March three" → ✅ "the third of March" / "March third"
  Always use ordinal form when saying dates aloud.

Practice Exercises

Put your knowledge to the test! Answer each question using the correct number form:

1. 1.Write the number 47 as a word. (Cardinal)
2. 2.How do you say the date "March 21st" in a full sentence?
3. 3.What is the ordinal form of the number 12?
4. 4.Write 1,250 in words.
5. 5.Which is correct: "twenty five" or "twenty-five"?

Answers: 1. Forty-seven  |  2. March twenty-first (or the twenty-first of March)  |  3. Twelfth  |  4. One thousand, two hundred and fifty  |  5. Twenty-five (hyphen required)

Conclusion

Now that you know the difference between cardinal and ordinal numbers, it’s time to put it into practice! 

Try writing a few sentences using both types to describe your daily routine or even your top ten movies. 

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