How Many Spaces After A Period?

It depends.

Mignon Fogarty
4-minute read
Episode #181

Although how many spaces you use is ultimately a style choice, using one space is by far the most widely accepted and logical style. The Chicago Manual of Style (1), the AP Stylebook (2), and the Modern Language Association (3) all recommend using one space after a period at the end of a sentence. Furthermore, page designers have written in begging me to encourage people to use one space because if you send them a document with two spaces after the periods, they have to go in and take all the extra spaces out.

I know it's a hard habit to break if you were trained to use two spaces, but if you can, give one space a try.

"That" Versus "Who"

On to the next topic, @Ranix at Twitter asked me whether a dog is a who or a that. For example, should he write

A dog who wants your love...


A dog that wants your love...

First, let's talk very briefly about people. You can use the word "that" to refer to people, but "who" is the better choice (4).

She's the girl who teaches us grammar.

He's the boy who spilled lasagna last week.

(For more information on "who" versus "that" for people, see Grammar Girl episode #24.)


About the Author

Mignon Fogarty

Mignon Fogarty is the founder of Quick and Dirty Tips and the author of seven books on language, including the New York Times bestseller "Grammar Girl's Quick and Dirty Tips for Better Writing." She is an inductee in the Podcasting Hall of Fame, and the show is a five-time winner of Best Education Podcast in the Podcast Awards. She has appeared as a guest expert on the Oprah Winfrey Show and the Today Show. Her popular LinkedIn Learning courses help people write better to communicate better.