writing an essay numbers

Have a language expert improve your writing

Run a free plagiarism check in 10 minutes, generate accurate citations for free.

• Knowledge Base
• Academic writing
• Writing numbers: words and numerals

APA Style Guidelines for Numbers | Words or Numerals?

Published on August 7, 2015 by Sarah Vinz . Revised on July 23, 2023.

Numbers can be written either as words (e.g., one hundred) or numerals (e.g., 100). In this article we follow the guidelines of APA Style , one of the most common style guides used in academic writing .

In general, words should be used for numbers from zero through nine, and numerals should be used from 10 onwards. This is true for both cardinal numbers (e.g., two, 11) and ordinal numbers (e.g., second, 11 th ). However, there are some important exceptions to this rule.

Note that other style guides, such as Chicago Style,  address numbers differently (for example, in Chicago, you use words for numbers up to 100). Regardless of what style guide you follow, the most important thing is to be consistent in how you treat numbers throughout your document.

Instantly correct all language mistakes in your text

Upload your document to correct all your mistakes in minutes

Table of contents

Writing percentages, reporting statistical results that include numbers, writing numbers that are accompanied by measurements, writing long numbers, consistency may not be obvious, other interesting articles.

Use numerals for numbers from zero to nine that are followed by a precise unit of measurement.

The samples measured 7 cm in diameter. (“cm” is a unit of measurement)

But: These three samples were subjected to further testing.

Use words for any number that is used to start a sentence, with the exception of years.

Seventy-two thousand ink cartridges are sold every day.

Nineteenth-century novels often feature complicated plot lines.

But: 2008 saw record olive crops throughout the Mediterranean.

Use words for common fractions and set expressions.

According to the survey, two thirds of the employees are dissatisfied.

Understanding the Five Pillars of Islam is a critical first step.

The Fourth of July is traditionally marked by a firework display.

Check for common mistakes

Use the best grammar checker available to check for common mistakes in your text.

Fix mistakes for free

With percentages, the standard is to use numerals and “%” (not “percent”).

According to the report, 45% of the workforce is employed in the service sector. Only 6% currently work in agriculture.

The main exception is if you are using a percentage to begin a sentence. In this case, use words to express the entire percentage.

Thirteen percent of the patients reported that their symptoms improved after taking the experimental drug.

If your paper includes quantitative research, you probably have data to report. Statistics, mathematical functions, ratios, and percentages are all written using numerals. This is true regardless of whether they are included within a table or as part of the actual text. Keep the following guidelines in mind:

• Report most statistics to two decimal places (such as M = 5.44).
• Report statistics that could never exceed 1.0 to three decimal places (such as p < .001).
• If a value has the potential to exceed 1.0, use the leading zero. If a value can never exceed 1.0, do not use the leading zero.
• Italicize values that are not Greek letters (such as M , SD , p , and F ).
• Include spaces before and after =, >, and <.

The average IQ of the participants was relatively high ( M = 137.33, SD = 4.54).

The results of the second test were statistically significant, t (12) = 4.11, p < .05.

There are further detailed guidelines about reporting statistics in APA .

If a number comes immediately before a unit of measurement, use numerals.

Each patient received  5 mg  of the experimental drug.

The tallest participant was 2.03 m .

Also use numerals for precise ages, times, dates, scores, points on a scale, and amounts of money.

The final score of Ghana 2, Brazil 1 did not represent a decisive victory.

Children under 8 years receive a $50 discount.

But: Most girls start reading when they are about five years old. (“about” makes the number imprecise)

Here's why students love Scribbr's proofreading services

Discover proofreading & editing

Longer numbers follow specific rules:

• Use a period to indicate a decimal point.
• Starting with 1,000, use commas to separate every three digits.

The region has an average of 43.75 doctors for every 10,000 people.

Some predict that the number of users will reach 2 billion by 2020.

One of the main reasons why writing numbers is complicated is that consistently applying the rules may lead to a text that actually seems very in consistent. Consider the following paragraphs:

At about the age of seven , the girl’s height was 1.47 m. This placed her in the fifth percentile, although her weight placed her in the top 7% of her class. By the time she was 9 years old, she was taller than half of the boys in her year. Five years later, she was still ranked 15 th .

Thirteen thousand viewers watched the performance of Shakespeare’s Twelfth Night from the park, while another 2,000 watched from the surrounding buildings and 1.2 million watched it on television. As one  out of every 11 residents saw at least part of the play, this one event can definitely be considered a success.

These texts may look awkward because so many different number formats have been used, but don’t be deceived – the above guidelines have all been followed.

If you are not required to strictly follow a particular style (such as APA format ), you may have some flexibility to modify the guidelines presented in this article. Just be sure to apply any modifications you make throughout your entire document.

If you want to know more about AI for academic writing, AI tools, or fallacies make sure to check out some of our other articles with explanations and examples or go directly to our tools!

• Begging the question fallacy
• Hasty generalization fallacy
• Equivocation fallacy
• False cause fallacy
• Sunk cost fallacy
• Deep learning
• Generative AI
• Machine learning
• Reinforcement learning
• Supervised vs. unsupervised learning

 (AI) Tools

• Grammar Checker
• Paraphrasing Tool
• Text Summarizer
• AI Detector
• Plagiarism Checker
• Citation Generator

Cite this Scribbr article

If you want to cite this source, you can copy and paste the citation or click the “Cite this Scribbr article” button to automatically add the citation to our free Citation Generator.

Vinz, S. (2023, July 23). APA Style Guidelines for Numbers | Words or Numerals?. Scribbr. Retrieved October 8, 2024, from https://www.scribbr.com/academic-writing/numbers/

Is this article helpful?

Sarah's academic background includes a Master of Arts in English, a Master of International Affairs degree, and a Bachelor of Arts in Political Science. She loves the challenge of finding the perfect formulation or wording and derives much satisfaction from helping students take their academic writing up a notch.

Other students also liked

Reporting statistics in apa style | guidelines & examples, using abbreviations and acronyms, language mistakes in quotes, get unlimited documents corrected.

✔ Free APA citation check included ✔ Unlimited document corrections ✔ Specialized in correcting academic texts

Essay Papers Writing Online

Simple and clear rules for writing numbers in an essay that will impress any reader.

When it comes to showcasing numerical information within an essay or any other form of written content, it is essential to master the art of effectively conveying numerical data. Numbers, whether they represent statistical figures, percentages, monetary values, or quantities, require a unique approach in order to engage the reader and provide a clear understanding of the information being presented.

In the realm of written expression, numbers can often appear mundane and monotonous, dulling the impact of the overall message. However, through the use of creative and thoughtful techniques, one can transform these numerical figures into engaging storytelling tools that enhance the flow and impact of the written work.

Emphasizing numerical data can be achieved through various methods , starting with the careful selection of appropriate linguistic devices. Utilizing vivid and descriptive language, such as powerful adjectives and adverbs, can bring numbers to life and create a visual representation in the reader’s mind. For example, instead of simply stating that the company’s profit increased by 20%, one could say that the profit skyrocketed or surged by an astounding 20%. This not only adds excitement and energy to the writing but also captures the reader’s attention and encourages them to delve deeper into the information being presented.

Rules for Writing Numbers in an Essay

When it comes to writing numbers in an essay, there are certain rules and guidelines that should be followed. These rules ensure clarity and consistency throughout the essay, making it easier for readers to understand the information being presented. By adhering to these rules, writers can effectively communicate numerical information in a way that is both accurate and professional.

1. Spell out numbers from zero to nine. Numbers that are spelled out from zero to nine should be written as words in an essay. For example, “two apples,” “sixty-three percent,” or “nine thousand.” This helps to maintain consistency and readability in the text.

2. Use numerals for numbers 10 and above. Numbers that are 10 or greater should be written using numerals in an essay. For example, “14 fish,” “85 participants,” or “101 pages.” This makes it easier for readers to quickly comprehend the numerical information without any confusion.

3. Follow specific style guides for exceptions. In some cases, specific style guides may have exceptions to the general rules for writing numbers. For example, certain style guides may require the use of numerals for numbers that are greater than 100. Make sure to consult the appropriate style guide for any exceptions that may apply to your writing.

4. Use numerals for dates, times, and measurements. When writing dates, times, and measurements, it is generally preferred to use numerals rather than spelling them out. For example, “On July 4, 2023,” “at 12:30 p.m.,” or “3 meters long.” This helps to convey the exactness and precision of the information being presented.

5. Be consistent. Consistency is key when it comes to writing numbers in an essay. Choose a specific style and stick to it throughout the entire essay. Whether you choose to spell out numbers from zero to nine or use numerals for all numbers, make sure to apply the same formatting consistently.

By following these rules for writing numbers in an essay, writers can ensure that their numerical information is presented accurately and professionally. This enhances the overall clarity and comprehension of the essay, making it easier for readers to engage with the content.

Learn the basic guidelines for writing numbers in academic essays

Gain a solid understanding of the fundamental principles for expressing numerical values in your academic essays. Properly presenting numbers is essential for maintaining clarity and consistency in your writing. By adhering to these basic guidelines, you can ensure that your essays adhere to standard formatting conventions and effectively convey information to your readers.

1. Spell out small whole numbers: In general, numbers from one to nine are spelled out in academic essays. For example, instead of writing “2 cats,” you would write “two cats.” This practice helps to maintain a smooth flow of reading and prevents numerical symbols from disrupting the text.

2. Use numerals for large numbers and numbers with decimal points: When dealing with numbers greater than nine or numbers that involve decimal points, it is appropriate to use numerals. For instance, you would write “17 participants,” “6.5 percent,” or “2,500 words.” Numerals are especially useful for conveying exact values and facilitating comparisons.

3. Express common measurements with symbols: When discussing well-known units of measurement, it is acceptable to use their symbols without spelling them out. For example, “3 km” instead of “three kilometers” or “5 kg” instead of “five kilograms.” This approach saves space and is widely understood in academic writing.

4. Be consistent in expressing numerical ranges: When indicating a range of values, use the appropriate punctuation for clarity. For instance, you would write “between 5 and 10 books,” “from 200 to 300 participants,” or “in the years 1990-2000.” Consistency within a range helps the reader easily grasp the scope of the given information.

5. Follow specific style guides: Different style guides may have their own rules for writing numbers. For example, APA style may differ from MLA style. It is important to consult the style guide specified by your academic institution or instructor to ensure accurate and consistent presentation of numbers in your essays.

By following these basic guidelines, you can effectively incorporate numbers into your academic essays and enhance the overall clarity and professionalism of your writing.

The Role of Consistency in Writing Numbers

Consistency plays a crucial role when it comes to writing numbers in various contexts. Maintaining a consistent style throughout an essay or any written piece not only enhances readability but also ensures clarity and professionalism. Consistency in writing numbers refers to using the same format and style when expressing numerical values, whether they are written in digits or spelled out in words. Consistency helps to avoid confusion and allows readers to understand and interpret the numbers accurately.

One aspect of consistency in writing numbers involves deciding whether to use numerals or words. It is important to establish a set of guidelines and follow them consistently. For example, in scientific or technical writing, it is common to use numerals for measurements, percentages, statistics, and mathematical expressions. On the other hand, when writing literary or journalistic pieces, it is often preferred to spell out numbers up to ten and use numerals for larger values. By consistently applying these guidelines, writers can ensure that their numerical references are not only stylistically appropriate but also coherent within the context of their work.

Another aspect of consistency in writing numbers is ensuring that the same format is used throughout the entire essay or document. This includes deciding whether to use commas or spaces for thousands separators, the placement of decimal points, the use of currency symbols, and the format for dates and times. Consistency in these formatting choices helps readers to quickly and accurately interpret the numbers presented. It also helps to establish a professional and organized appearance in the written piece.

In addition to maintaining consistency within a single piece of writing, it is also important to be consistent across different documents or sources. This is particularly relevant when referencing numbers or data from external sources, such as research studies or statistical reports. By using consistent formats and styles, writers can provide a clear and cohesive presentation of numerical information, making it easier for readers to compare and understand the data across different sources.

Understand why consistency is important when writing numbers in an essay

Consistency plays a vital role when it comes to writing numbers in an essay. It ensures uniformity and clarity in conveying numerical information to the readers. By maintaining consistency in the representation of numbers, writers can effectively communicate their ideas and avoid confusion or misinterpretation. This section will delve into the importance of consistency and how it helps in enhancing the overall quality of an essay.

Consistency eliminates ambiguity: When writing numbers, inconsistency can lead to ambiguity, making it difficult for readers to comprehend the intended meaning. By following consistent formatting rules, such as using numerals for larger numbers or spelling out numbers for general descriptions, writers can ensure clarity and eliminate any confusion that arises from inconsistent presentation.

Consistency enhances readability: Readers easily navigate through an essay when it follows a consistent style and structure, including the representation of numbers. Consistent use of numerals or spelled-out numbers within the same context creates a visual rhythm, making the text more readable and engaging. It also helps readers to quickly identify relevant information and grasp the intended message without any distractions.

Consistency promotes professionalism: In academic and professional writing, consistency is valued as it reflects a meticulous approach to communication. By consistently using the appropriate conventions for writing numbers, writers demonstrate attention to detail and adherence to established standards. This conveys professionalism and enhances the credibility of the essay, making it more persuasive and impactful.

Consistency ensures accuracy: Writing numbers inconsistently can lead to inaccuracies and errors, especially when dealing with statistical or technical information. By maintaining consistency, writers can avoid potential mistakes and convey accurate data to support their arguments. Whether it is using consistent formatting for decimal places, percentages, or measurements, consistency ensures the precision and reliability of the information presented.

Consistency fosters a cohesive narrative: Writing an essay involves presenting ideas and arguments in a logical and coherent manner. By employing consistent styles and conventions for numbers, writers create a cohesive narrative that flows smoothly throughout the text. This consistency not only aids in the readability of the essay but also contributes to the overall coherence and structure of the piece, allowing the reader to follow the writer’s train of thought effortlessly.

In conclusion, consistency in writing numbers is essential as it eliminates ambiguity, enhances readability, promotes professionalism, ensures accuracy, and fosters a cohesive narrative. By applying consistent formatting and following established rules, writers can effectively communicate numerical information in an essay, making it more accessible, impactful, and engaging for the readers.

When to Spell Out Numbers in an Essay

Choosing whether to write a number as a numeral or spell it out can be a matter of style and convention. There are certain guidelines that can help determine when it is appropriate to spell out numbers in an essay.

When considering whether to use numerals or words to represent numbers, it is important to consider the context and purpose of the writing. In academic or formal writing, it is generally recommended to spell out numbers that can be expressed in one or two words, and to use numerals for numbers greater than nine or when emphasizing a specific quantity. However, in more informal or creative writing, it is often acceptable to use numerals for any number, as long as it is consistent throughout the essay.

Another factor to consider is the specific style guide or formatting guidelines being used. Different style guides, such as APA, MLA, and Chicago, have their own rules for when to spell out numbers and when to use numerals. It is important to consult the appropriate style guide for the specific requirements of the essay or writing assignment.

Additionally, when writing about percentages, currencies, and measurements, it is generally recommended to use numerals instead of spelling them out. This helps to ensure clarity and consistency in the representation of these specific types of numbers.

Ultimately, the decision to spell out numbers or use numerals in an essay may vary depending on the style, context, and guidelines being followed. It is important to consider the specific requirements and expectations of the writing situation to determine the most appropriate approach for representing numbers in the essay.

Discover the instances when numbers should be spelled out in your essay

One of the key elements in writing a well-crafted essay is effectively using numbers. While it may be tempting to use numerals for convenience and brevity, there are instances when it is important to spell out numbers. By doing so, you can enhance readability, maintain consistency, and adhere to established writing conventions.

When it comes to writing numbers, it is important to consider the context and purpose of your essay. In some cases, it is best to spell out numbers to provide clarity and avoid confusion. For instance, when expressing exact quantities, such as counting individuals or items, it is generally preferred to spell out numbers from one to nine. This helps to maintain flow and avoid disruption in the text.

Furthermore, when writing about statistics or data that are not precise measures, it is often recommended to spell out the numbers. This can help to convey a sense of importance and avoid the appearance of unnecessary precision. For example, instead of writing “5.3 million people,” you could write “over five million people” to capture the magnitude of the statistic without an excessive level of detail.

In addition, spelling out numbers can be particularly important when discussing percentages or ratios. This allows you to emphasize the proportion or relationship being described without the distraction of numerals. For example, instead of writing “25% of the population,” you could write “a quarter of the population” to convey the same information in a more engaging and understandable way.

Another instance where spelling out numbers is important is when they are used at the beginning of a sentence. It is considered more appropriate and aesthetically pleasing to spell out numbers in these cases to maintain consistency and avoid starting sentences with numerals. This can help to create a smoother reading experience for your audience.

Overall, understanding the instances when numbers should be spelled out in your essay can greatly enhance the quality of your writing. By being mindful of the context, purpose, and conventions of your essay, you can effectively utilize numbers to enhance clarity and readability. So, whether you are discussing exact quantities, statistics, percentages, or starting a sentence, remember to consider when it is best to spell out the numbers rather than using numerals.

Using Numerals in Academic Writing

Utilizing digits and numbers effectively is a fundamental aspect of academic writing. The correct presentation of numerical data can enhance the clarity, precision, and professionalism of your writing. Whether you are discussing statistics, presenting results, or referencing research findings, understanding how to use numerals properly is essential.

In academic writing, it is common practice to use numerals for numbers greater than nine. This helps to ensure consistency, readability, and ease of comprehension for your readers. Additionally, using numerals can also help to create a concise and efficient writing style.

When discussing percentages, decimal numbers, or fractions, it is generally best to use numerals. For example, “The study found that 75% of participants reported an improvement in their overall well-being.” Similarly, numerical measurements such as distances, weights, and temperatures should also be expressed using digits, such as “The experiment was conducted at a temperature of -20°C.”

However, there are exceptions to the use of numerals in academic writing. For example, when beginning a sentence, it is recommended to spell out numbers instead of using digits. For instance, “Fifty participants were selected for the study.” Additionally, when referring to approximate or rounded numbers, it is often best to use words. For example, “The population of the city is approximately one million people.”

In some cases, the choice to use numerals or words may be a matter of style or preference, and it is important to follow the guidelines set by your academic institution or discipline. Paying attention to these details can help to ensure the accuracy and professionalism of your writing.

Overall, the appropriate use of numerals in academic writing can significantly enhance the clarity and impact of your work. By adhering to the conventions of using numerals for numbers greater than nine, using digits for percentages and measurements, and applying exceptions for certain situations, you can ensure that your writing is accurate, consistent, and engaging.

Related Post

How to master the art of writing expository essays and captivate your audience, convenient and reliable source to purchase college essays online, step-by-step guide to crafting a powerful literary analysis essay, unlock success with a comprehensive business research paper example guide, unlock your writing potential with writers college – transform your passion into profession, “unlocking the secrets of academic success – navigating the world of research papers in college”, master the art of sociological expression – elevate your writing skills in sociology.

When to Spell Out Numbers in Writing: Guide and Examples

#scribendiinc

The Rules for Writing Numbers in English 

You may have noticed a theme when it comes to the English language: most rules are not standardized. This (somewhat frustrating) fact is especially true when it comes to spelling out numbers. Should you write them out in words or leave them as numerals? To write numbers properly, you will also need to identify potential differences between major style guides (such as MLA , APA , and Chicago , to name a few) because these guides often outline different rules for using numbers in writing.

To make it easier, let's use an example. Say you're working on a paper evaluating the importance of the local public library in your community. The document will make use of small numbers, large numbers, decades, and statistics. Each type of number may follow a different rule.

Thankfully, when using numbers in writing, you can count on a few conventions that apply to most situations; just be sure to consult your specific style guide if one has been assigned. If you don't have time to review each number yourself, a professional editor or proofreader can ensure that your numbers are written correctly.

Writing Small and Large Numbers

A simple rule for using numbers in writing is that small numbers ranging from one to ten (or one to nine, depending on the style guide) should generally be spelled out. Larger numbers (i.e., above ten) are written as numerals.

For example, instead of writing "It cost ten-thousand four-hundred and sixteen dollars to renovate the local library," you would write, "It cost $10,416 to renovate the local library."

The reason for this is relatively intuitive. Writing out large numbers not only wastes space but could also be a major distraction to your readers.

Beginning a Sentence with a Number

Here is a rule that you can truly rely on: always spell out numbers when they begin a sentence, no matter how large or small they may be.

Incorrect: 15 new fiction novels were on display.

Correct: Fifteen new fiction novels were on display.

If the number is large and you want to avoid writing it all out, rearrange the sentence so that the number no longer comes first.

Revised: There were 15 new fiction novels on display.

Whole Numbers vs. Decimals

Another important factor to consider is whether you are working with a whole number or a decimal. Decimals are always written as numerals for clarity and accuracy.

To revisit our library example, perhaps circulation statistics improved in 2015. If a number falls in the range of one to ten and is not a whole number, it should be written as a numeral.

Incorrect: The circulation of library materials increased by four point five percent in 2015.

Correct: The circulation of library materials increased by 4.5% in 2015.

Paired Numbers (Two Numbers in a Row)

When two numbers come next to each other in a sentence, be sure to spell out one of these numbers. The main purpose of this rule is to avoid confusing the reader.

Incorrect: There were 12 4-year-old children waiting for the librarian to begin story time.

Correct: There were 12 four-year-old children waiting for the librarian to begin story time.

Correct: There were twelve 4-year-old children waiting for the librarian to begin story time.

Decades and Centuries

Decades or centuries are usually spelled out, especially if the writing is formal.

Incorrect: The library was built in the '50s.

Correct: The library was built in the fifties.

If you are referring to a specific year (e.g., 1955), use the numeral.

Consistency Is Key When Using Numbers in Your Writing

Always strive for consistency, even if it overrides a previous rule. For example, if your document uses numbers frequently, it is more appropriate for all numbers to remain as numerals to ensure that usage is uniform throughout. Similarly, if a single sentence combines small and large numbers, make sure that all the numbers are either spelled out or written as numerals.

Incorrect: The library acquired five new mystery novels, 12 new desktop computers, and 17 new periodicals.

Correct: The library acquired 5 new mystery novels, 12 new desktop computers, and 17 new periodicals.

Style Guides May Have Slightly Different Rules for Writing Numbers in Words

Let's complicate things a bit, shall we?

If your work must follow the rules of a specific style guide, understand that various guides all have rules for spelling out numbers that may differ slightly from the rules listed above. For example, MLA style indicates that writers may spell out numbers if they are not used too frequently in the document and can be represented with one or two words (e.g., twenty-four, one hundred, three thousand ). APA style advises that common fractions (e.g., two-thirds ) be expressed as words. A number of specific rules for spelling out numbers are outlined in Section 9.1 of the Chicago Manual of Style.

Your ultimate authority will always be a style guide, but in the absence of one, following the rules outlined above will help you stay consistent in your use of numbers in writing.

Image source: lyulkamazur/envato.elements.com

Perfect the Details. Get Professional Editing and Proofreading.

Hire an expert academic editor , or get a free sample.

About the Author

Scribendi's in-house editors work with writers from all over the globe to perfect their writing. They know that no piece of writing is complete without a professional edit, and they love to see a good piece of writing turn into a great one after the editing process. Scribendi's in-house editors are unrivaled in both experience and education, having collectively edited millions of words and obtained nearly 20 degrees collectively. They love consuming caffeinated beverages, reading books of various genres, and relaxing in quiet, dimly lit spaces.

Have You Read?

"The Complete Beginner's Guide to Academic Writing"

Related Posts

Online Research Tips for Students and Scholars: Our Most Helpful Articles

Punctuation Marks

The Semicolon and Colon

Upload your file(s) so we can calculate your word count, or enter your word count manually.

We will also recommend a service based on the file(s) you upload.

English is not my first language. I need English editing and proofreading so that I sound like a native speaker.

I need to have my journal article, dissertation, or term paper edited and proofread, or I need help with an admissions essay or proposal.

I have a novel, manuscript, play, or ebook. I need editing, copy editing, proofreading, a critique of my work, or a query package.

I need editing and proofreading for my white papers, reports, manuals, press releases, marketing materials, and other business documents.

I need to have my essay, project, assignment, or term paper edited and proofread.

I want to sound professional and to get hired. I have a resume, letter, email, or personal document that I need to have edited and proofread.

 Prices include your personal % discount.

 Prices include % sales tax ( ).

Purdue Online Writing Lab Purdue OWL® College of Liberal Arts

Writing Numbers

Welcome to the Purdue OWL

This page is brought to you by the OWL at Purdue University. When printing this page, you must include the entire legal notice.

Copyright ©1995-2018 by The Writing Lab & The OWL at Purdue and Purdue University. All rights reserved. This material may not be published, reproduced, broadcast, rewritten, or redistributed without permission. Use of this site constitutes acceptance of our terms and conditions of fair use.

Although usage varies, most people spell out numbers that can be expressed in one or two words and use figures for numbers that are three or more words long. Note: If you are using a specific citation style, such as MLA or APA , consult the style manual for specific formatting instructions.

Here are some examples of specific situations:

Days and Years

Time of Day

Identification Numbers

Page and Division of Books and Plays

Decimals and Percentages

Large Round Numbers

Notes on Usage

Repeat numbers in commercial writing.

Use numerals in legal writing.

Numbers in series and statistics should be consistent.

Write out numbers beginning sentences.

Use a combination of figures and words for numbers when such a combination will keep your writing clear.