Skip to main content

How Many Spaces After a Period?

What's the rule: Use one space or two spaces after a period? We have the answer (and the reason for it).

Q: My writing course instructor insists that I should go back through my novel manuscript and use only one space after periods instead of two spaces. I was taught that it was always a double space after period. Is she wrong or am I just a dinosaur?—Anonymous

(Click here to view our 12 most popular grammar posts.)

A: The "two spaces after period" rule was established during the days of typesetters, when additional space was needed to show the difference between the spacing between words (which was smaller) and the spacing between sentences (which was larger). When typewriters came around, they had only one font and all the letters were monospaced, or took up the same amount of space. That means that the skinny “l” and wider “w” occupied the same amount of space on paper. People mimicked what they believed to be the format they'd grown used to by adopting two spaces after a period—and that's how the so-called two-space rule was born.

With the dawn of computers, word processing programs not only began offering an absurd number of fonts, but each font was programmed to space characters proportionally (“l” takes up about a third of the space “w” does). In turn, most computer fonts will automatically give you enough room between sentences with one space. And, according to nearly all stylebooks, including The Associated Press Stylebook and the Chicago Manual of Style, you always use a single space after a period.

How Many Spaces After a Period?

The point is, it's not only widely accepted, it's expected that you use only one space after a period. Sorry two-spaces, it's time to make the switch.

QUICK TIP FOR THOSE WHO USE TWO SPACES: If you are someone who can't break your two spaces after a period habit, have no fear! Simply write as you always would (with two spaces) and, when you are finished, got to the toolbar of your word processing program, click EDIT > FIND > REPLACE, and then choose to replace all double spaces with single spaces. Problem solved!

No matter what type of writing you do, mastering the fundamentals of grammar and mechanics is an important first step to having a successful writing career.

No matter what type of writing you do, mastering the fundamentals of grammar and mechanics is an important first step to having a successful writing career.

Click to continue.

Writer's Digest Best Everything Agent Websites for Writers 2022

Writer's Digest Best Everything Agent Websites for Writers 2022

Here are the top websites by and about agents as identified in the 24th Annual 101 Best Websites from the May/June 2022 issue of Writer's Digest.

Ashley Poston: On Love, Death, and Books

Ashley Poston: On Love, Death, and Books

Author Ashley Poston discusses how she combined her love of ghost stories, romance, and books into her new romance novel, The Dead Romantics.

Choosing Which Movements To Put in Your Fight Scene (FightWrite™)

Choosing Which Movements To Put in Your Fight Scene (FightWrite™)

Trained fighter and author Carla Hoch discusses how much of a fight's details to actually put into a story, and how even with fight scenes sometimes less is more.

5 Research Tips for Writing Historical Fiction, by Piper Huguley

5 Research Tips for Writing Historical Fiction

Author Piper Huguley shares her five research tips for writing historical fiction that readers love and writers love as well.

Announcing 40 More Plot Twist Prompts for Writers!

Announcing 40 More Plot Twist Prompts for Writers!

Learn more about 40 Plot Twist Prompts for Writers, Volume 2: ALL NEW Writing Ideas for Taking Your Stories in New Directions, by Writer's Digest Senior Editor Robert Lee Brewer. Discover fun and interesting ways to move your stories from beginning to end.

Interviewing Tips | Tyler Moss

Interviewing 101: Tips for Writers

Interviewing sources for quotes or research will be part of any writer's job. Here are tips to make the process as smooth and productive as possible.

Plot Twist Story Prompts: Eliminate Threat

Plot Twist Story Prompts: Eliminate Threat

Every good story needs a nice (or not so nice) turn or two to keep it interesting. This week, have a character work to eliminate a threat.

4 Tips for Writing Gothic Horror

4 Tips for Writing Gothic Horror

Gothic horror and its many subgenres continues to increase in popularity. Here, author Ava Reid shares 4 tips on writing gothic horror.

Lucy Clarke: On the Power of Creativity

Lucy Clarke: On the Power of Creativity

Novelist Lucy Clarke discusses how a marathon of writing led to a first draft in just 17 days for her new psychological thriller, One of the Girls.