Proper English rules for when and how to write numbers from The Blue of Grammar and Punctuation.

This section discusses numbers, how to write them correctly, and when to use numerical expressions instead.

Jul 16, 2021 · Different editorial style manuals have different rules for when to spell out numbers instead of using numerals. Here are a few examples of when to spell out numbers, and when to use numerals.

Jul 7, 2022 · Familiarize yourself with the rules for writing out numbers in academic and professional writing. Learn how to write out numbers for style guides like APA, MLA, Chicago, and more.

Apr 29, 2025 · Spell out numbers one through ten and numbers above ten if they are two words or less. Always spell out numbers that start a sentence for better readability in formal writing. Use numbers …

Jul 8, 2020 · Here are the general rules on whether to write a number in words or numerals (figures) in formal writing: 1. Spell out single-digit numbers (zero to nine). Write all other numbers as numerals.

Always use numerals to express numbers in the following cases, even numbers zero through nine: Also use numerals to write numbers that denote a specific place in a numbered series when the number …

Jun 17, 2025 · Rules for writing numbers depend on the writer and the style guide. Some writers avoid using digits for 0–10 and then use them for anything higher. Others opt to write out the word if the …

See the hyphenation guide at CMOS 7.96, section 1, under “ numbers, spelled out,” which says this (the rule is stated on the right and the examples are on the left): Twenty-one through ninety-nine …

Aug 9, 2021 · Chicago’s general rule: “Chicago advises spelling out whole numbers from zero through one hundred and certain round multiples of those numbers.” Here’s an example: Twelve houses sold …