How Do You Write Numbers in AP Style?

 

Writing numbers correctly is an important aspect of clear and professional communication. Different style guides have specific rules about when to spell out numbers and when to use numerals. In journalism and many media fields, the Associated Press (AP) Style is the standard guide.

This article provides a comprehensive overview of the AP Style rules for writing numbers, explaining the guidelines, exceptions, and best practices for using numbers effectively in writing.

---

What Is AP Style?

Before diving into numbers, it’s important to understand the context. AP Style is a set of rules and guidelines used primarily by journalists and media professionals in the United States and around the world. Its main goal is to ensure clear, concise, and consistent communication, especially in news writing.

Because news must be quickly understood by a broad audience, AP Style favors readability and simplicity.

---

Basic AP Style Rules for Writing Numbers

1. Spell Out Numbers One Through Nine

AP Style instructs writers to spell out the numbers one through nine in most cases. This means writing “one,” “two,” “three,” etc., instead of using the numerals 1, 2, 3.

Example:

• She adopted three puppies from the shelter.

• The company hired seven new employees.

2. Use Numerals for Numbers 10 and Above

For numbers 10 and above, AP Style prefers numerals instead of words.

Example:

• There were 15 students in the classroom.

• The event attracted 120 participants.

---

Additional Rules and Exceptions

While the above rules cover most situations, AP Style includes several important exceptions and guidelines:

3. Always Use Numerals for:

• Ages:
  When referring to a person’s or animal’s age, always use numerals.
  Example: The boy is 5 years old.
  Example: The cat is 12 years old.

• Percentages:
  Use numerals followed by the percent sign (%).
  Example: The company’s profits increased by 7% last quarter.

• Dates, Years, and Times:
  Use numerals for days of the month, years, and times of day.
  Example: The meeting is scheduled for March 3.
  Example: The year 2025 will bring many changes.
  Example: The train arrives at 6:30 a.m.

• Money:
  Use numerals with currency symbols or the word “dollars.”
  Example: The car costs $20,000.
  Example: She donated $500 to the charity.

• Scores and Stats:
  Use numerals when reporting sports scores, statistics, and measurements.
  Example: The final score was 4-2.
  Example: He ran 5 miles in 40 minutes.

---

4. Spell Out Numbers at the Beginning of a Sentence

Regardless of size, spell out any number that begins a sentence. However, it is often better to rewrite sentences to avoid starting with a large number.

Example:

• Fifteen students were absent today.

• Instead of: 120 people attended the concert, rewrite as: The concert was attended by 120 people.

---

5. Use Numerals for Dimensions and Addresses

• Dimensions (height, weight, length) should use numerals.
  Example: The table is 6 feet long.

• Addresses use numerals for street numbers.
  Example: They live at 1234 Maple Street.

---

6. Use Numerals for Decimals and Fractions

• Always use numerals for decimals and mixed fractions. Spell out simple fractions in casual contexts.
  Example: The recipe calls for 2 1/2 cups of flour.
  Example: She ate 0.75 of the pie.

---

7. Use Numerals for Time, Including A.M. and P.M.

• Use numerals with lowercase “a.m.” and “p.m.” without periods in abbreviations.
  Example: The meeting starts at 9 a.m. and ends at 5 p.m.

---

Special Cases and Clarifications

Numbers in Series

When numbers appear in a series, maintain consistency by using numerals for all numbers to avoid confusion.

Example: The conference sessions are scheduled for 7, 8, and 10 a.m.

Large Numbers

For large numbers, AP Style recommends using numerals combined with words like million, billion, or trillion rather than writing all digits.

Example: The population reached 3 million.
Example: The government allocated $5 billion for infrastructure.

---

Summary of AP Style Number Rules

Situation	Rule	Example
Numbers 1-9	Spell out	three, seven
Numbers 10 and above	Use numerals	15, 120
Ages	Use numerals	5 years old
Percentages	Use numerals + %	7%, 12.5%
Dates, years, times	Use numerals	March 3, 2025, 6:30 a.m.
Money	Use numerals + $ or “dollars”	$20,000, 500 dollars
Scores and stats	Use numerals	4-2, 5 miles
Sentence start	Spell out any number at sentence start	Fifteen students
Dimensions and addresses	Use numerals	6 feet, 1234 Main St
Decimals and fractions	Use numerals	2 1/2 cups, 0.75

Why These Rules Matter

Using numbers correctly in AP Style ensures your writing is:

• Clear: Readers immediately understand the magnitude and specifics without confusion.

• Consistent: Uniform rules make text easier to read and professional.

• Concise: Using numerals for larger numbers saves space and improves readability, especially in news contexts.

• Credible: Following a recognized style guide like AP enhances trustworthiness and editorial quality.

---

Conclusion

Mastering how to write numbers in AP Style is essential for journalists, writers, editors, and anyone communicating with a broad audience. By spelling out smaller numbers and using numerals for larger ones and specific contexts like dates, money, and ages, writers can produce clear, professional, and reader-friendly content.

For those new to AP Style, keeping a copy of the Associated Press Stylebook or using trusted online resources can be invaluable. With practice, these guidelines will become second nature and improve the quality of your writing.