AP style for numbers is the system used by Associated Press journalists to decide when to write a number as a figure and when to spell it out, and it matters far beyond the newsroom because clear numbers help every reader understand scale, time, and money at a glance. If you have ever wondered whether to write “nine” or “9”, “percent” or a symbol, or “3 p.m.” or “3:00 p.m.”, ap style for numbers gives you a consistent answer. This guide explains the core rules in plain language, with examples you can apply to news writing, business writing, school work, and everyday professional documents, even if you are not a journalist.
The central principle of ap style for numbers is readability. Numbers should help the reader, not slow the reader down. Small numbers are usually spelled out because words flow naturally in a sentence, while larger numbers are usually shown as figures because figures are easier to scan and compare. Once you understand that principle, most of the detailed rules start to make sense. AP style for numbers is not about making writing look formal or informal; it is about removing friction so that the facts stand out clearly and consistently.
AP Style for Numbers: The Basic Rule
The basic rule in ap style for numbers is simple: spell out whole numbers from zero through nine, and use figures for 10 and above. For example, write “three cats”, “seven days”, and “nine players”, but write “10 cats”, “14 days”, and “25 players”. This rule applies to most ordinary counts in news writing. It also applies when numbers appear in a series: if one number in a group is 10 or above, the style guidance often treats related numbers consistently, but the safest starting point for beginners is to apply the zero-to-nine rule to each number on its own and then check consistency within the sentence.
There are important exceptions to the basic rule in ap style for numbers. Ages, for example, always use figures, so you write “a 5-year-old child” and “a 42-year-old teacher”, not spelled-out ages. Percentages also use figures, with the word “percent” spelled out in AP style, as in “9 percent” and “27 percent”. Money, measurements, dimensions, and many technical values also use figures, because precision matters more than the general spelling rule. Learning ap style for numbers therefore means learning the basic rule first, then learning the categories where figures always win.
AP Style for Numbers in Sentences
One of the most useful rules in ap style for numbers is that a sentence should not begin with a figure. If a number starts a sentence, spell it out, even if it is 10 or above, or rewrite the sentence so the number appears later. For example, write “Twenty-five people attended the meeting” rather than starting with “25 people attended”. Alternatively, rewrite as “The meeting was attended by 25 people”. This rule keeps the opening of a sentence readable and avoids the visual jolt of a figure at the very start. AP style for numbers treats sentence openings as a special case because the first word sets the rhythm for everything that follows.
Another sentence-level rule in ap style for numbers concerns ordinals, which are numbers showing order, such as first, second, and third. AP style spells out first through ninth and uses figures for 10th and above, as in “first place”, “ninth inning”, and “12th anniversary”. This mirrors the basic rule and keeps ordinals consistent with ordinary counts. Writers should also avoid stacking figures awkwardly, such as placing two numbers side by side without a clear separator, because the reader may struggle to tell where one value ends and the next begins. When in doubt, rewrite the sentence with a word between the numbers.
When Figures Help and When Words Help
Figures help when the reader needs to compare values quickly, as in statistics, scores, prices, and measurements. Words help when the number is part of a natural phrase, such as “a thousand thanks” in a figurative sense, or when a small count appears in narrative prose. AP style for numbers balances these needs by keeping small counts in words and larger counts in figures. In a news story, that balance means a sentence such as “Nine students raised 250 dollars for the school fair” reads naturally, because the small count is spelled out while the larger amount is shown as a figure that the eye can grasp immediately.
Consistency Within a Story
Consistency is a quiet but powerful part of ap style for numbers. Readers notice when the same kind of value is written one way in one paragraph and another way in the next paragraph. If you write ages as figures in the first paragraph, keep writing ages as figures throughout. If you write percentages with figures, do not suddenly spell out a percentage later without a reason. Consistency does not mean forcing every number into the same form; it means applying the same rule to the same category every time. That discipline is what makes professional writing feel polished, even when readers cannot name the rule being followed.
AP Number Style: Money, Percentages, and Dates
Money is one of the clearest categories in ap style for numbers. Use figures and the dollar sign for amounts, and omit unnecessary decimal places for whole dollars, as in “5 dollars” in older AP guidance and the modern figure form that most newsrooms use for prices and budgets. For large amounts, AP style uses a combination of figures and words, such as “1 million dollars” or “2.5 billion dollars”, rather than writing out all the zeros. This approach keeps large financial values readable while preserving precision. Writers should also avoid repeating the currency symbol and the word “dollars” in the same value, because that duplication adds clutter without adding information.
Percentages in ap style for numbers always use figures, even for values below 10, and AP spells out the word “percent” rather than using the symbol in most news text. Write “4 percent”, “9 percent”, and “63 percent”. For a percentage change, be precise about the base: a rise from 10 percent to 15 percent is a rise of 5 percentage points, not a rise of 5 percent, and that distinction matters in business and policy writing. Dates in ap style for numbers also follow figure-based rules: use figures for days of the month without ordinal endings, as in “Oct. 26” in AP abbreviation style or “October 26” in fuller prose, and use figures for years, as in “2026”. Months are abbreviated in AP style when used with a specific date, but spelled out when standing alone or with a year only.
| Category | AP style for numbers rule | Example |
|---|---|---|
| Ordinary counts 0 to 9 | Spell out | three books, seven days, nine teams |
| Ordinary counts 10 and above | Use figures | 10 books, 14 days, 25 teams |
| Ages | Always use figures | 5-year-old child, 42-year-old teacher |
| Percentages | Figures plus the word percent | 4 percent, 27 percent, 63 percent |
| Ordinals | Spell out first to ninth, figures from 10th | first place, ninth inning, 12th anniversary |
| Sentence openings | Spell out, or rewrite the sentence | Twenty-five people attended |
| Money | Figures, with million or billion for large sums | 1 million dollars, 2.5 billion dollars |
AP Number Style: Time, Measurements, and Dimensions
Time in ap style for numbers uses figures with “a.m.” and “p.m.” in lowercase with periods, as in “9 a.m.” and “3:30 p.m.”. AP style omits “:00” for times on the hour, so “9 a.m.” is preferred over a form with minutes added. For ranges, write “from 9 a.m. to 5 p.m.” rather than compressing the range in a way that confuses the reader. Days of the week are spelled out, and dates are written with figures for the day, as noted above. These time rules matter because readers often scan for times first, and a consistent time format helps them find meeting times, deadlines, and event schedules without re-reading the sentence.
Measurements and dimensions in ap style for numbers also use figures, with the unit spelled out or abbreviated according to the stylebook entry for that unit. Write “5 feet tall”, “10 miles”, and “3 inches long” in general prose, and use figures for weights, distances, and temperatures as well. For dimensions, AP style often uses figures with multiplication signs or the word “by”, as in “a room 12 feet by 15 feet”. Fractions are spelled out in most prose, as in “one-half” and “two-thirds”, while decimals use figures, as in “2.5” and “0.75”. The key idea remains the same: precision values belong in figures, while small narrative counts belong in words.
Common Mistakes in AP Number Style
One common mistake in ap style for numbers is spelling out large numbers that should be figures, which makes sentences long and hard to scan. Another is using figures for small numbers in ordinary prose, which can make writing feel like a list of statistics rather than a story. A third mistake is mixing forms within the same category, such as writing “nine percent” in one paragraph and “12 percent” in the next, when AP style would use figures for both. Writers also frequently add ordinal endings to dates, writing a form that AP style avoids, or they use a percent symbol where AP style prefers the spelled-out word “percent” in news text. Each of these mistakes is easy to fix once the writer checks the category first and the size second.
Another frequent error is treating every number as if the basic rule applies, without checking for exceptions. Ages, percentages, money, measurements, and scores often require figures even when the value is small, and ap style for numbers expects writers to know those exceptions. A useful habit is to ask three questions before writing a number: What category is this value? Is it at the start of a sentence? Does the surrounding sentence already use the same category in a different form? Answering those questions takes only a few seconds, and it prevents most style errors. Writers who want broader guidance on clear prose may also find the writing guide with four tips for published authors and the style guide on how emojis are counted as words useful, because both focus on making writing consistent and reader-friendly.
AP Number Style: A Quick Checklist
Use this checklist whenever you edit a document for this style. First, spell out zero through nine and use figures for 10 and above for ordinary counts. Second, use figures for ages, percentages, money, measurements, and scores, regardless of size. Third, spell out first through ninth and use figures for 10th and above for ordinals. Fourth, never start a sentence with a figure; spell the number out or rewrite the sentence. Fifth, use figures for dates, times, and years, with AP abbreviations where appropriate. Sixth, spell out “percent” in news text and be precise about percentage points versus percent change. Seventh, check consistency: the same category should look the same throughout the document.
Finally, remember that this style is a living stylebook, and newsrooms update entries as language and technology change. If you work for a publication, follow its house style where it differs from the general AP rules, and note any house exceptions in your own style sheet. If you write for a general audience, following the core rules in this guide will cover the vast majority of cases and will make your writing look professional. The goal is not perfection on the first draft; it is a consistent, reader-first approach that you can apply quickly during editing.
Frequently Asked Questions About AP Number Style
Should I write nine or 9?
In this style, write “nine” for ordinary counts from zero through nine, and write “10” for 10 and above. Exceptions apply for ages, percentages, money, and measurements, which use figures even when small. If the number starts a sentence, spell it out or rewrite the sentence.
Should I use the percent symbol or the word percent?
In AP news style, spell out the word “percent” and use a figure for the value, as in “9 percent”. The symbol is common in charts, tables, and some non-news contexts, but the spelled-out word is the AP default for running text. Always check house style if you write for a specific publication.
How do I write ordinals in AP style?
Spell out first through ninth and use figures for 10th and above, as in “third quarter” and “12th floor”. Do not add ordinal endings to dates in AP style; write the day as a figure without an ending, as in “October 26”.
Conclusion
this style becomes easy once you learn the basic rule and its main exceptions. Spell out small ordinary counts, use figures for larger counts, and always use figures for ages, percentages, money, measurements, and scores. Avoid starting sentences with figures, keep ordinals consistent, and check that the same category looks the same throughout your document. With those habits, this style stops being a list of rules to memorise and becomes a practical editing tool that makes your writing clearer, more consistent, and more professional for every reader.